The cheapest way to get self-heating in a Group 31 battery, for cold-weather RV and marine use. Independent testing confirms its rated capacity.
Amazon $284.99
A cheap, IP65 Bluetooth 100Ah battery for RV, solar and marine use, from one of the larger storage-battery makers. Cold-climate users need a heated model instead.
- 100 Ah (1,280 Wh)Capacity
- 100 AContinuous output
- Charge cutoff onlyCold charging
- YesBluetooth
- 5 yearsWarranty
- $0.14Price / Wh
Price checked October 22, 2026. As an Amazon Associate we earn from qualifying purchases.
- One of the cheapest Bluetooth 100Ah batteries, from a large energy-storage maker
- IP65-rated case suits boats and trailers
- Up to 4 in series for 24V, 36V or 48V systems
- Accepts up to 100 A charging, so a big charger refills it in about an hour
- Group 31 case is longer than a Group 24 tray
- No self-heating: charging stops below freezing
- No peak-current rating published
How it scores
The rating comes from 6 measured or published factors, each scored 0-100 against fixed reference points for its size. How we rank explains each one.
Specifications
| Model number | AR1.2-BT |
|---|---|
| Capacity | |
| Rated capacity | 100 Ah (1,280 Wh) |
| Nominal voltage | 12.8 V |
| Chemistry | LiFePO4 |
| Rated cycle life | 3,000 at 100% depth |
| Price per Wh | $0.14 |
| BMS | |
| Continuous discharge | 100 A |
| Max charge current | 100 A |
| Low-temperature charging | Charge cutoff only |
| Bluetooth monitoring | Yes |
| Series / parallel | up to 4 in series, 4 in parallel |
| Build | |
| Case size | Group 31 |
| Dimensions | 12.99 x 6.77 x 8.43 in |
| Weight | 25.3 lb |
| Terminals | M8 |
| Water resistance | IP65 |
| Warranty | 5 years |
Alternatives in this size
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 $335.99For campers and small RV or van builds that need a compact, inexpensive 100Ah battery from a known brand. Choose a heated model if you charge below freezing.
Amazon $269.99Compare
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