4 Best Solid-State Car Batteries in 2027

If you’re searching for the best solid-state car batteries, these four options are lithium-based starting batteries, not the solid-state batteries used in some emerging EV research. All four use LiFePO4 or lithium-ion chemistry, and none should be treated as a universal replacement for a lead-acid battery. My shortlist puts the TET Group 47 first for its stated 1,200A CCA and extensive BMS protections, the Group 47 800 CCA model ahead for its stated 2,000-cycle life and 60-month warranty, and the Lipower Group 48 in a separate role for buyers whose vehicle takes the larger H6 size.

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The choice comes down to more than headline output. Group size, terminal layout, cold-cranking requirements, charging compatibility, and any battery-registration steps can decide whether a battery works in your vehicle. I compare the listed specifications and practical tradeoffs below; verify the exact requirements in your owner’s manual before ordering, especially for start-stop cars and vehicles with battery monitoring systems.

Key Takeaways

• TET Group 47: The strongest stated CCA in the Group 47 choices at 1,200A, paired with a BMS and a claimed 1,500-plus cycles; verify its unusually substantial 50-pound listed weight claim with the seller.
• Group 47 800 CCA: A balanced Group 47 option with a stated 2,000-cycle rating and 60-month warranty, though its dimensions differ from the other H5 batteries.
• TPE Group 47: The lightest specified option at 11.02 pounds, but its 600A CCA makes checking the vehicle’s starting requirement especially important.
• Lipower Group 48: The only Group 48/H6 battery here, with stated 1,200 CCA and 140-minute reserve capacity; it requires OBD battery registration after installation.
• Fit beats the label: These are lithium batteries, not proven solid-state cells; confirm chemistry suitability, dimensions, polarity, charging compatibility, and vehicle electronics before replacing lead-acid.

Our Top Best Solid-state Car Batteries Picks

TET 12V Group 47 LiFePO4 Car Battery, 1200A CCA		Best Overall for Group 47 Buyers Seeking High Stated CCA	Chemistry: LiFePO4	Group size: BCI Group 47 (H5)	Voltage: 12.8V	VIEW LATEST PRICE	See Our Full Breakdown
Group 47 (H5) 12.8V LiFePO4 Car Starting Battery, 800 CCA		Best Balanced Group 47 Pick for Cycle-Life and Warranty Claims	Chemistry: LiFePO4	Group size: 47 (H5)	Voltage: 12.8V	VIEW LATEST PRICE	See Our Full Breakdown
TPE Group 47 LiFePO4 Car Battery, 12.8V, 600A		Best Lightweight Option for Compatible Group 47 Start-Stop Cars	Chemistry: LiFePO4	Group size: 47	Voltage: 12.8V	VIEW LATEST PRICE	See Our Full Breakdown
Lipower Group 48 Solid-State Start-Stop Car Battery		Best Group 48/H6 Option with Stated Reserve Capacity	Chemistry: Lithium-ion	Group size: 48/H6/L3/66L3	Voltage: 12V	VIEW LATEST PRICE	See Our Full Breakdown

More Details on Our Top Picks

1. TET 12V Group 47 LiFePO4 Car Battery, 1200A CCA

   

   Best Overall for Group 47 Buyers Seeking High Stated CCA

   View Latest Price

   The TET is my lead pick for a buyer whose vehicle specifically takes a Group 47/H5 battery and whose starting requirements align with the product’s claims. Its headline differentiator is 1,200A CCA, higher than the 600A and 800A figures listed for the other Group 47 options here. It also claims a built-in BMS that guards against overcharge, overdischarge, overcurrent, short circuits, and temperature extremes. Those protections are relevant because a lithium starter battery depends on its management electronics as well as its cells.

   Its stated 1,500-plus cycles at 100% depth of discharge and maintenance-free design give it a different emphasis from the Group 47 800 CCA model, which claims up to 2,000 cycles and includes a 60-month warranty. TET instead makes the stronger output claim. I would not read either cycle figure as a direct prediction of years in a particular car: temperature, charging behavior, usage, and compatibility all affect service life.

   There is a specification question I would resolve before buying: the listing says the battery is 50% lighter than traditional lead-acid but does not give a clear weight in pounds. That makes the claim hard to compare with TPE’s 11.02 lb or the 800 CCA model’s 12.78 lb. TET also lists a negative-left, positive-right terminal layout, so a buyer should match both orientation and dimensions to the existing battery. High CCA cannot compensate for reversed terminals or a poor physical fit.

   Compared with the TPE, TET makes more sense when the vehicle calls for stronger stated cranking output; the TPE is easier to distinguish on a clearly specified low weight. Compared with the 800 CCA battery, TET favors output and a broad list of BMS protections, while the other model offers a longer stated cycle rating and a defined warranty. I place TET first because its stated 1,200A output and protection scope make the clearest all-around case within this Group 47 set, with fit and the unclear weight claim as meaningful caveats.

   Pros:

   • Stated 1,200A CCA, the highest figure among the Group 47 choices here.
   • BMS protection includes overcharge, overdischarge, overcurrent, short-circuit, and temperature safeguards.
   • Claims more than 1,500 cycles at 100% depth of discharge.
   • Maintenance-free design with low self-discharge.

   Cons:

   • Dimensions, terminal orientation, CCA requirements, and lithium compatibility still require vehicle-specific checks.
   • The supplied specifications do not give a clear weight in pounds, making the 50%-lighter claim difficult to compare.

   Best for: Owners whose vehicle specifies a Group 47/H5 battery and who want the strongest stated CCA among these Group 47 options, provided polarity and charging compatibility are confirmed.

   Not ideal for: Buyers who need a clearly documented battery weight, have a Group 48/H6 tray, or cannot verify that a LiFePO4 battery suits their vehicle’s charging and monitoring system.

   • Chemistry:LiFePO4
   • Group size:BCI Group 47 (H5)
   • Voltage:12.8V
   • Cold-cranking amps:1,200A stated
   • Dimensions:9.6 × 6.9 × 7.75 in
   • Terminal layout:Negative on left, positive on right
   • Cycle life:Over 1,500 cycles at 100% depth of discharge
   • Protection:Built-in BMS
   Our verdict

   “For a confirmed Group 47 fit, I rank TET first for its stated 1,200A CCA and wide-ranging BMS protection, while its weight details and vehicle compatibility need confirmation.”

   → See it on Amazon →

2. Group 47 (H5) 12.8V LiFePO4 Car Starting Battery, 800 CCA

   

   Best Balanced Group 47 Pick for Cycle-Life and Warranty Claims

   View Latest Price

   This Group 47 battery takes a more balanced route than the TET. Its stated 800 CCA is below TET’s 1,200A claim but above TPE’s 600A figure, and it pairs that output with a listed life of up to 2,000 cycles plus a 60-month warranty. For buyers who value a documented warranty and cycle-life claim alongside starting performance, those details give this option a distinct place in the lineup.

   The listed BMS covers temperature, overcharge, overdischarge, and short-circuit protection. That is a useful breadth of safeguards, though the product details do not provide a precise temperature range or explain how the battery behaves in every charging system. It is described as suitable for start-stop applications, but I would still check the vehicle manual and confirm lithium compatibility instead of assuming that the start-stop label settles the question.

   Fit is a larger concern here than its Group 47 name may suggest. At 9.4 × 6.9 × 7.5 inches, it is shorter in the listed length and height than the TET and TPE, both of which are around 9.6 inches long and 7.75 inches high. That difference could help in some trays or leave a poor fit in others; the hold-down and cable reach matter along with the nominal group designation. Its 12.78 lb listed weight is clear, unlike TET’s vague lighter-than-lead-acid claim, though TPE is lighter at 11.02 lb.

   I rank it just behind TET because the headline CCA claim is lower, but it may be the better match for a buyer who puts more weight on the stated cycle count and 60-month warranty. Compared with TPE, it offers 200A more stated CCA and a defined warranty, while giving up about 1.76 lb in listed weight. It is not the right pick for someone who needs the highest listed Group 47 output or who has not checked the slightly different dimensions.

   Pros:

   • Claims up to 2,000 cycles, the highest stated cycle count in this roundup.
   • Includes a stated 60-month warranty.
   • BMS lists temperature, overcharge, overdischarge, and short-circuit protections.
   • At 12.78 lb, its listed weight is specific and easy to compare.

   Cons:

   • Its stated 800 CCA is below TET’s 1,200A figure.
   • Dimensions differ from the other Group 47 batteries, so group designation alone is not enough to confirm fit.
   • The supplied details do not include customer feedback or independent test results.

   Best for: Group 47 owners who want a middle-ground stated CCA figure and value the listed 2,000-cycle rating and 60-month warranty.

   Not ideal for: Drivers whose vehicle requires higher CCA than the listed 800A, or shoppers who need the dimensions to match a standard H5 envelope without checking measurements.

   • Chemistry:LiFePO4
   • Group size:47 (H5)
   • Voltage:12.8V
   • Cold-cranking amps:800 CCA
   • Dimensions:9.4 × 6.9 × 7.5 in
   • Weight:12.78 lb
   • Cycle life:Up to 2,000 cycles
   • Warranty:60 months
   Our verdict

   “I’d choose this Group 47 model over TPE for its higher stated CCA and warranty, but only after checking its shorter listed dimensions against the battery tray.”

   → See it on Amazon →

3. TPE Group 47 LiFePO4 Car Battery, 12.8V, 600A

   

   Best Lightweight Option for Compatible Group 47 Start-Stop Cars

   View Latest Price

   TPE is the easy-to-compare lightweight choice: its listed weight is 11.02 lb, lower than the 12.78 lb listed for the 800 CCA battery and far more specific than TET’s percentage-based weight claim. It is designed for start-stop vehicles and high-power electronics, and its Group 47 dimensions—9.60 × 6.92 × 7.75 inches—are close to TET’s. Buyers replacing a battery in a weight-sensitive setup may find that clear figure helpful, though vehicle fit and battery chemistry compatibility remain the deciding checks.

   The tradeoff is starting output. TPE lists 600A CCA, with a separate claim of up to 700 CCA tested. That is below the 800 CCA model and well below TET’s 1,200A listing. A lower figure does not automatically make it unsuitable; it does mean I would match it carefully against the vehicle manufacturer’s minimum requirement and the conditions in which the car starts. If the existing battery’s specified CCA is higher, I would favor a correctly compatible higher-output option instead.

   Its BMS protection covers overcharge, overdischarge, and overcurrent. The emergency switch is a notable extra: after a low-power shutdown, it is described as providing up to 10 minutes of temporary operation. That may offer a short opportunity to move or start the vehicle, but it is not a substitute for a charged battery or a roadside recovery plan. The product information does not list a cycle-life figure or warranty, leaving less detail for comparing long-term ownership with the 800 CCA model.

   Compared with TET, TPE offers a clearly stated, very low weight and an emergency feature but gives up substantial listed CCA and some BMS protection categories. Compared with the 800 CCA battery, it is lighter by the supplied figures but lacks that model’s stated 2,000-cycle rating and 60-month warranty. I place it third because its weight and temporary-use switch create a clear niche, while the lower CCA claim and thinner long-term information make it a more conditional choice.

   Pros:

   • Listed weight of 11.02 lb, the lightest specified weight in this roundup.
   • Designed for start-stop vehicles and high-power electronic systems.
   • BMS protection covers overcharge, overdischarge, and overcurrent.
   • Emergency switch is described as allowing up to 10 minutes of temporary use after low-power shutdown.

   Cons:

   • The listed 600A CCA is lower than the 800A and 1,200A claims on the other Group 47 models.
   • The supplied specifications do not state a cycle-life rating or warranty.
   • The emergency switch is a short-term aid, not a replacement for adequate charge or repair.

   Best for: Drivers with a confirmed Group 47 fit who prioritize a clearly specified low weight and whose vehicle’s required CCA is within the battery’s stated capability.

   Not ideal for: Owners who need a higher CCA figure, want a stated cycle-life rating or warranty for comparison, or expect the emergency switch to provide more than brief temporary operation.

   • Chemistry:LiFePO4
   • Group size:47
   • Voltage:12.8V
   • Cold-cranking amps:600A; up to 700 CCA tested claim
   • Dimensions:9.60 × 6.92 × 7.75 in
   • Weight:11.02 lb
   • BMS:Overcharge, overdischarge, and overcurrent protection
   • Emergency switch:Up to 10 minutes of temporary use after low-power shutdown
   Our verdict

   “TPE is the lightest clearly specified Group 47 choice, but I would select it only when 600A CCA meets the vehicle’s requirements.”

   → See it on Amazon →

4. Lipower Group 48 Solid-State Start-Stop Car Battery

   

   Best Group 48/H6 Option with Stated Reserve Capacity

   View Latest Price

   Lipower is the only Group 48/H6 battery in this comparison, so it is not a direct fit alternative to the three Group 47 products. For a vehicle that calls for Group 48/H6/L3/66L3, it offers a stated 1,200 CCA, 60Ah capacity, and 140-minute reserve capacity. Those figures give buyers more information about both starting output and the battery’s stated ability to support loads, while the Group 47 models are aimed at a different tray size.

   Its listed weight is 17.6 lb, with a liquid-free design and a stated 10-year lifespan. The product also lists a five-year warranty. Those are useful claims to compare, but they do not establish real-world service life or prove that the battery will suit every vehicle in the named size group. The description identifies the chemistry as lithium-ion rather than LiFePO4, another reason not to assume that it shares all of the charging behavior or protection characteristics of the three Group 47 options.

   The biggest installation distinction is the OBD battery registration requirement. Some vehicles require battery registration or coding when a replacement is fitted; here, the product information explicitly calls for it. A buyer without the right diagnostic access may need a shop or a compatible scan tool, adding work beyond a straightforward battery swap. I would confirm the exact procedure for the vehicle before ordering rather than discovering the requirement after installation.

   Compared with TET, Lipower matches the 1,200 CCA headline but serves a larger battery group and lists a reserve-capacity figure; it also has a more demanding installation note. Compared with all three Group 47 choices, it makes sense only when the vehicle calls for H6 dimensions. I rank it fourth overall because it is a useful, clearly distinct fitment option, not because its stated figures are weak. For an H6 vehicle, it may be the relevant pick; for a Group 47 tray, it is the wrong category.

   Pros:

   • Stated 1,200 CCA, matching the highest output claim in the lineup.
   • Lists 60Ah capacity and 140-minute reserve capacity.
   • Liquid-free design with a stated 17.6 lb weight.
   • Includes a stated five-year warranty.

   Cons:

   • Group 48/H6 dimensions are not interchangeable with the Group 47 options.
   • OBD battery registration is required after installation.
   • Listed as lithium-ion, while the other three products specify LiFePO4; vehicle charging compatibility needs confirmation.

   Best for: Owners whose vehicle specifies a Group 48/H6/L3 battery and who want stated 1,200 CCA, 60Ah capacity, and 140-minute reserve capacity.

   Not ideal for: Drivers who need a Group 47/H5 battery, cannot arrange OBD battery registration, or have not confirmed that the vehicle supports this lithium-ion battery.

   • Chemistry:Lithium-ion
   • Group size:48/H6/L3/66L3
   • Voltage:12V
   • Capacity:60Ah
   • Cold-cranking amps:1,200 CCA
   • Reserve capacity:140 minutes
   • Dimensions and weight:10.9 × 7.44 × 6.88 in; 17.6 lb
   • Installation and warranty:OBD battery registration required; five-year warranty
   Our verdict

   “For a confirmed H6 fit, Lipower’s stated output and reserve capacity are appealing, but the OBD registration requirement and lithium compatibility call for preparation.”

   → See it on Amazon →

How We Picked

I ranked these batteries by how clearly their supplied specifications support a real buying decision, rather than by treating the word “solid-state” as proof of a new battery technology. The product details identify three options as LiFePO4 and the Lipower as lithium-ion. They do not establish that any of them uses a true solid-state electrolyte, so I describe them as lithium car batteries and judge the claims provided.

For a starting battery, I gave particular weight to group size, stated cold-cranking amps, protection circuitry, and installation demands. CCA is a useful comparison point, but it does not establish compatibility by itself: the correct battery also needs to fit the tray, connect with the correct polarity, suit the vehicle’s charging system, and meet its specified starting requirements. I treated the TET’s 1,200A claim as a strong on-paper advantage while noting that the supplied listing does not resolve fit or vehicle compatibility.

I also compared the claims that may matter over ownership: cycle-life ratings, warranty coverage, reserve capacity, weight, and special features. Those figures come from the supplied product information, not independent verification. The ranking reflects each option’s role: TET leads for stated starting output and protections; the 800 CCA model follows for its cycle-life and warranty claims; TPE is the lightweight, lower-output alternative; and Lipower serves a different Group 48 fitment with reserve capacity but adds a registration step.

Finally, I did not use customer ratings or review counts as ranking criteria. The product information supplied does not establish broad vehicle-by-vehicle compatibility, lithium charging guidance, or independent test results. Before purchase, I would check the vehicle maker’s battery specification and confirm that the battery manufacturer supports that make, model, year, and charging system.

Factors to Consider When Choosing Best Solid-state Car Batteries

I would start with the car, not with the battery’s headline claims. These products have different group sizes, chemistries, dimensions, and installation needs, so a ranking cannot replace a fitment check. Use the following comparisons to narrow the field, then confirm the exact battery specification with the vehicle manual or manufacturer.

Treat “solid-state” as a search phrase, not a verified chemistry

The supplied descriptions identify the TET, TPE, and 800 CCA batteries as LiFePO4; Lipower is identified as lithium-ion. None of the provided specifications confirms a solid-state electrolyte. In common automotive discussions, a true solid-state battery refers to a different cell design from standard lithium-ion cells with liquid or gel electrolyte. These products are best evaluated from the chemistry and specifications actually listed, rather than assuming the title phrase means they use that emerging technology.

This difference matters because chemistry affects charging requirements, temperature behavior, protection electronics, and compatibility with a car’s alternator or battery-management system. I would ask the manufacturer whether the battery is approved for the exact vehicle and charging setup. A familiar 12V label does not by itself prove that a lithium replacement is a safe match for a system designed around lead-acid, AGM, or EFB batteries.

Match group size, dimensions, polarity, and hold-down

Three picks are Group 47/H5; Lipower is Group 48/H6. Those labels point to different battery formats, so the Lipower should not be treated as a substitute for the other three just because its voltage and output look similar. Even within the Group 47 choices, listed dimensions vary: the 800 CCA unit is 9.4 × 6.9 × 7.5 inches, while TET and TPE are about 9.6 × 6.9 × 7.75 inches. Small differences can affect tray fit, securing hardware, cable reach, and cover clearance.

Check terminal position and polarity as carefully as the outside measurements. TET lists negative on the left and positive on the right; the other product details do not provide equally explicit orientation information. Compare the positive and negative post locations with the battery being replaced and the manufacturer’s fitment data. A battery that fits the tray but puts the terminals on the wrong side is not a workable match.

Choose CCA against the vehicle’s requirement

Cold-cranking amps describe starting output under a standardized cold test, making CCA useful for comparing batteries. The supplied figures are not identical: TPE lists 600A, with a separate claim of up to 700 CCA tested; the 800 CCA model lists 800; TET lists 1,200A; and Lipower lists 1,200 CCA. These figures help separate the products on paper, but they are not a substitute for the car maker’s minimum specification or a confirmed fitment recommendation.

I would avoid choosing the lowest or highest number based on a general rule. Instead, check the original battery label, owner’s manual, and fitment guidance for the exact year, engine, and equipment. Start-stop systems and high electrical loads can place different demands on the battery. A battery with generous stated CCA still may be incompatible if the car requires a particular battery type or a system reset.

Understand BMS features and what they do not tell you

A battery management system can monitor and protect a lithium battery from specified electrical or temperature conditions. TET lists the broadest set here, including short-circuit and temperature protection; the 800 CCA model also lists temperature safeguards; TPE lists overcharge, overdischarge, and overcurrent protection. These feature lists can help compare stated protection scope, but they do not reveal the cut-off thresholds, recovery behavior, or cold-weather starting performance.

Ask for the manufacturer’s operating-temperature limits, charging guidance, and vehicle compatibility information. The presence of a BMS is not proof that a battery can be installed in any car or charged by any alternator. It is one part of a complete system, and the product details provided do not cover every vehicle-level behavior.

Compare long-term claims cautiously

The products provide different ownership claims rather than a like-for-like test: TET says more than 1,500 cycles at 100% depth of discharge; the 800 CCA battery says up to 2,000 cycles and gives a 60-month warranty; Lipower states a 10-year lifespan and a five-year warranty. TPE’s supplied details do not list a cycle count or warranty. These figures can guide questions, but cycle-life ratings and stated lifespan do not guarantee the same result in a vehicle exposed to varied temperatures, partial charging, and frequent starts.

Read warranty terms for exclusions, registration steps, and how the warranty is handled. A listed warranty period is not the same as a promise that every failure is covered. I would also check whether the manufacturer gives clear instructions for charging, storage, and battery testing. The 800 CCA model stands out for a defined warranty in the supplied details; TET stands out for a stated cycle rating; Lipower gives both a stated lifespan and warranty, but requires vehicle-specific registration.

Account for weight, reserve capacity, and installation

Weight can matter when reducing vehicle mass, but the supplied numbers should be read carefully. TPE lists 11.02 lb and the 800 CCA model lists 12.78 lb; Lipower lists 17.6 lb. TET claims it is 50% lighter than a traditional lead-acid battery without providing a pounds figure in the supplied specifications. That makes TPE the clearest choice if a specific low listed weight is the priority, though its CCA is the lowest of the four.

Lipower is the only battery here with a stated 140-minute reserve capacity, giving H6 buyers a comparison point beyond cranking output. Its OBD battery registration requirement also changes the installation plan. Before buying any of these, confirm whether the vehicle needs registration, coding, a reset, or professional installation. Plan for the work as part of the battery choice rather than treating the installation note as an afterthought.

Frequently Asked Questions

Are these four batteries true solid-state batteries?

The supplied product information identifies three as LiFePO4 and one as lithium-ion, but it does not verify a solid-state electrolyte for any of them. I would describe them as lithium car batteries unless the manufacturer provides clear technical documentation confirming a solid-state cell design. The phrase in a search or product title is not enough to establish the battery’s internal construction.

Can I replace my lead-acid or AGM battery with one of these lithium models?

Not without checking the vehicle’s requirements. Confirm the approved battery chemistry, charging system compatibility, group size, terminal polarity, CCA requirement, and any battery-monitoring or start-stop requirements. Some vehicles need registration or coding after replacement, and Lipower specifically lists OBD battery registration. Ask the vehicle maker or battery manufacturer about the exact year, model, and engine before installing a lithium battery.

Which Group 47 battery has the highest stated CCA?

TET lists 1,200A CCA, ahead of the 800 CCA Group 47 model and TPE’s 600A CCA listing, with a separate up-to-700 CCA tested claim for TPE. That makes TET the highest stated-output choice among the Group 47 products here. I would still compare the figure with the car maker’s requirements and confirm that TET’s dimensions and negative-left, positive-right terminal layout match the vehicle.

Does a higher cycle-life claim mean the battery will last longer in my car?

Not by itself. TET claims more than 1,500 cycles at 100% depth of discharge, while the 800 CCA model claims up to 2,000 cycles, but those figures do not directly predict service life in a specific car. Temperature, charging behavior, usage, vehicle compatibility, and the conditions behind each manufacturer’s rating all matter. Review the warranty and request the test conditions before using cycle count as a deciding factor.

Which option is right if my car takes a Group 48/H6 battery?

Lipower is the only Group 48/H6 option in this comparison; the other three are Group 47/H5 batteries and should not be treated as equivalent replacements. Lipower lists 1,200 CCA, 60Ah capacity, and 140-minute reserve capacity, but it also requires OBD battery registration and is identified as lithium-ion. Confirm its dimensions, chemistry compatibility, and registration process with the vehicle’s service information before ordering.

Conclusion

My recommendation depends on the battery your vehicle is built to take. For a confirmed Group 47/H5 fit and a priority on stated starting output, I would begin with TET, then verify polarity, dimensions, and lithium compatibility. If I valued a stated cycle-life figure and a defined warranty more than the highest CCA claim, I would compare the 800 CCA Group 47 model closely, especially after checking its shorter listed dimensions. TPE is the clear choice for someone prioritizing a low stated weight, provided its 600A CCA meets the vehicle specification.

For a vehicle that specifically calls for Group 48/H6, Lipower is the relevant option here, with stated reserve capacity and 1,200 CCA; I would include the required OBD registration in the installation plan. Whatever the fitment, these are described as lithium batteries rather than verified solid-state products. I would confirm chemistry approval, charging instructions, terminal layout, warranty terms, and exact fit before choosing any of them.