LiTime 12V 100Ah Group 31
#3 in 100 Ah classFull review
A good-value Group 31 drop-in for boats and RVs used in mild climates. Independent testing shows it delivers more than its rated 100Ah.
Amazon $335.99$335.99
The LiTime 12V 100Ah Group 31 is the better 12V lithium battery overall, rated 3.8 to 3.6. The LiTime 12V 100Ah Group 31 leads on value. The LiTime 12V 100Ah Group 31 costs $74 less ($335.99 vs $409.99).
LiTime 12V 100Ah Self-Heating Bluetooth
#11 in 100 Ah classFull review
For RVers and boaters who charge in sub-freezing weather. The built-in heater and Bluetooth monitoring justify the premium over the standard model.
Amazon $409.99$409.99
Prices were last checked October 22, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Which should you buy?
- Choose the LiTime 12V 100Ah Group 31 for value ($0.26 per rated Wh vs $0.32 per rated Wh).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every 100 Ah class 12V lithium battery; a clear win is highlighted. How we rank explains each one.
| Factor weight | LiTime 12V 100Ah Group 31 | LiTime 12V 100Ah Self-Heating Bluetooth |
|---|---|---|
| Overall rating | 3.8/5 | 3.6/5 |
| Value 35% | 73 $0.26 per rated Wh | 63 $0.32 per rated Wh |
| Tested capacity 15% | 100 106% of rated capacity measured (1 test) | 50 not yet independently tested (neutral score used) |
| Output 15% | 50 100 A continuous (about 1,280 W at 12.8 V) | 50 100 A continuous (about 1,280 W at 12.8 V) |
| Warranty 15% | 50 5-year warranty | 50 5-year warranty |
| Cycle life 10% | 50 4,000 cycles at 100% depth, maker rating | 50 4,000 cycles at 100% depth, maker rating |
| Cold weather 10% | 50 low-temperature charging protection not stated (neutral score used) | 100 self-heating, so it charges below freezing |
Independent capacity tests
LiTime 12V 100Ah Group 31
| Tested by | Measured | Energy | Of rated | Discharge | Conditions |
|---|---|---|---|---|---|
| techtest.org | 106.5 Ah | 1,380 Wh | 106% | 5 A | ATORCH DLB-600W electronic load to BMS cutoff; EU unit (329 x 172 x 214 mm). Same test also measured 106.06 Ah / 1363 Wh at 10 A and 105.57 Ah / 1320.8 Wh at 20 A. |
LiTime 12V 100Ah Self-Heating Bluetooth
No independent test published yet.
Specifications
| LiTime 12V 100Ah Group 31 | LiTime 12V 100Ah Self-Heating Bluetooth | |
|---|---|---|
| Capacity | ||
| Rated capacity | 100 Ah (1,280 Wh) | 100 Ah (1,280 Wh) |
| Tested capacity | 106% of rated | - |
| Nominal voltage | 12.8 V | 12.8 V |
| Chemistry | LiFePO4 | LiFePO4 |
| Rated cycle life | 4,000 at 100% depth | 4,000 at 100% depth |
| Price per Wh | $0.26 | $0.32 |
| BMS | ||
| Continuous discharge | 100 A | 100 A |
| Low-temperature charging | - | Self-heating |
| Bluetooth monitoring | No | Yes |
| Series / parallel | up to 4 in series, 4 in parallel | up to 4 in series, 4 in parallel |
| Build | ||
| Case size | Group 31 | Group 24 |
| Dimensions | 13 x 6.77 x 8.43 in | 10.24 x 6.61 x 8.27 in |
| Weight | 22.1 lb | 22.7 lb |
| Water resistance | IP65 | IP65 |
| Warranty | 5 years | 5 years |