Optima Digital 400+
#12 in Up to 5 AFull review
A maintainer for owners of OPTIMA AGM or lithium batteries who want matched charge settings and a clear display. Others can get more amps for the money.
Amazon $149.99$149.99
2.7/5
A low cost maintainer for keeping a stored car, motorcycle or mower battery topped up. It is too slow to rescue a flat car battery quickly.
- 1.5 ACharge current
- 6/12 VVoltage
- NoLithium mode
- 1 yearWarranty
Check price at Amazon$22.30
Price checked October 31, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- Very low price for a maintainer you can leave connected all winter
- Comes with both clamps and ring leads, so it can stay wired to a bike or mower battery
- Desulfation mode can help an older battery recover lost capacity
Cons
- At 1.5 A it takes a day or more to recharge a flat car battery
- No lithium mode
- Only a 1 year warranty
How it scores
The rating comes from 4 measured or published factors, each scored 0-100 against fixed reference points for its current. How we rank explains each one.
Specifications
| Model number | SC1355 |
|---|---|
| Charging | |
| Charge current | 1.5 A |
| Voltage | 6/12 V |
| Lithium mode | No |
| AGM mode | No |
| Temperature compensation | No |
| Repair mode | Yes |
| Power supply mode | No |
| Build | |
| Weight | 1.2 lb |
| Warranty | 1 year |
| Released | 2017-12 |
Alternatives in this current
Battery Tender Junior Multi-Chemistry
#13 in Up to 5 AFull review
The pick for riders with a lithium motorcycle or powersport battery who want a simple, small maintainer for storage.
Amazon $42.49$42.49
Battery Tender Plus 1.25 A
#15 in Up to 5 AFull review
A long lived maintainer for lead acid car and truck batteries in storage, backed by a ten year warranty. Buyers who also need lithium support or faster charging should look elsewhere.
Amazon $58.95$58.95
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