Suited to bass boats and small electric outboards that need 36V 100Ah in one case. The larger footprint suits boats with an 8D style compartment.
Amazon $909.99
A strong value for 36V trolling motors, with far more current headroom than the 50Ah competition. Check that the GC2 height fits before buying.
- 55 Ah (2,112 Wh)Capacity
- 150 AContinuous output
- Charge cutoff onlyCold charging
- $0.15Price / Wh
Price checked November 2, 2026. As an Amazon Associate we earn from qualifying purchases.
- 150 A continuous output is triple most 36V 50Ah batteries, so high-thrust motors never hit the limit
- Cheapest 36V battery here, with more capacity than the 50Ah rivals
- IP65 case and cold-weather charge cutoff suit marine use
- GC2 shape is taller than Group 31, so check tray height first
- No Bluetooth or warranty term stated on the listing
How it scores
The rating comes from 6 measured or published factors, each scored 0-100 against fixed reference points for its voltage. How we rank explains each one.
Specifications
| Model number | AR2.1-36V TM |
|---|---|
| Capacity | |
| Rated capacity | 55 Ah (2,112 Wh) |
| Nominal voltage | 38.4 V |
| Chemistry | LiFePO4 |
| Rated cycle life | 4,000 at 100% depth |
| Price per Wh | $0.15 |
| BMS | |
| Continuous discharge | 150 A |
| Peak discharge | 800 A |
| Low-temperature charging | Charge cutoff only |
| Series / parallel | up to 1 in series, 4 in parallel |
| Build | |
| Case size | GC2 |
| Dimensions | 10.24 x 7.09 x 10.62 in |
| Weight | 30 lb |
| Water resistance | IP65 |
Alternatives in this voltage
Best for boats that need 36V 100Ah in a shorter footprint with better waterproofing. Owners with room for a long case can save a little with the outboard model.
Amazon $929.99A premium 36V 50Ah for anglers who run high-thrust motors hard and fish in cold weather. Budget buyers get the same capacity for much less elsewhere.
Epoch $749Compare
Compare the Dyness 36V 55Ah with any other 24V or 36V lithium battery →
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