# Battery Tender Plus (021-0128) vs SC1281 6/2/30/100A Charger & Engine Starter: specs and price compared

A sourced, side-by-side comparison of the Battery Tender Plus (021-0128) (Battery Tender) and SC1281 6/2/30/100A Charger & Engine Starter (Schumacher) among car battery chargers.

## Side by side

| Spec | Battery Tender Plus (021-0128) | SC1281 6/2/30/100A Charger & Engine Starter |
| --- | --- | --- |
| US price | not published | not published |
| Brand | Battery Tender | Schumacher |
| Max charge amps | 1.25 | 12 |
| Voltage support (V) | 12 | 6, 12 |
| Battery chemistry | Flooded, Sealed/GRT (Gas Recombinant Technology), and AGM 12V lead-acid batteries | Standard (flooded), AGM, Gel, and Deep-Cycle lead-acid batteries |
| Modes | Fully automatic 4-step charging: bulk charge, absorption, and adaptive float/maintenance (ISM) | 5-in-1: battery charger (2/6/12A continuous, multi-stage, microprocessor-controlled), battery maintainer, 30A boost/rapid charge, 100A engine start, plus built-in battery and alternator testing |
| Waterproof rating | — | — |
| Reverse polarity protection | — | Yes |
| Display | 3-LED indicator (red = bulk charging, flashing green = absorption, solid green = float/complete) | Red 7-segment LED digital readout plus indicator lights for rate selection, battery type, and a clamps-reversed warning |
| Temperature compensation | — | — |

## Key differences

- Max charge amps: Battery Tender Plus (021-0128) 1.25 vs SC1281 6/2/30/100A Charger & Engine Starter 12
- Voltage support (V): Battery Tender Plus (021-0128) 12 vs SC1281 6/2/30/100A Charger & Engine Starter 6, 12
- Battery chemistry: Battery Tender Plus (021-0128) Flooded, Sealed/GRT (Gas Recombinant Technology), and AGM 12V lead-acid batteries vs SC1281 6/2/30/100A Charger & Engine Starter Standard (flooded), AGM, Gel, and Deep-Cycle lead-acid batteries
- Modes: Battery Tender Plus (021-0128) Fully automatic 4-step charging: bulk charge, absorption, and adaptive float/maintenance (ISM) vs SC1281 6/2/30/100A Charger & Engine Starter 5-in-1: battery charger (2/6/12A continuous, multi-stage, microprocessor-controlled), battery maintainer, 30A boost/rapid charge, 100A engine start, plus built-in battery and alternator testing
- Display: Battery Tender Plus (021-0128) 3-LED indicator (red = bulk charging, flashing green = absorption, solid green = float/complete) vs SC1281 6/2/30/100A Charger & Engine Starter Red 7-segment LED digital readout plus indicator lights for rate selection, battery type, and a clamps-reversed warning

## Sources

- Battery Tender Plus (021-0128): https://www.manualslib.com/manual/1661410/Battery-Tender-Plus-12v1-25a.html (manualslib.com, verified 2026-08-01)
- SC1281 6/2/30/100A Charger & Engine Starter: https://www.schumacherelectric.com/products/6-2-30-100a-6v-12v-charger-engine-starter/ (schumacherelectric.com, verified 2026-08-01)

Canonical: https://frontdeskreview.com/gear/car-battery-chargers/battery-tender-plus-021-0128-vs-schumacher-sc1281/
Cite: Per The Front Desk Review, Battery Tender Plus (021-0128) (not published) vs SC1281 6/2/30/100A Charger & Engine Starter (not published) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/car-battery-chargers/battery-tender-plus-021-0128-vs-schumacher-sc1281/
License: CC BY 4.0.