# Battery Tender Plus (021-0128) vs DXAEC100 30A Battery Charger, Engine Starter & Maintainer: specs and price compared

A sourced, side-by-side comparison of the Battery Tender Plus (021-0128) (Battery Tender) and DXAEC100 30A Battery Charger, Engine Starter & Maintainer (DEWALT) among car battery chargers.

## Side by side

| Spec | Battery Tender Plus (021-0128) | DXAEC100 30A Battery Charger, Engine Starter & Maintainer |
| --- | --- | --- |
| US price | not published | not published |
| Brand | Battery Tender | DEWALT |
| Max charge amps | 1.25 | 30 |
| Voltage support (V) | 12 | 12 |
| Battery chemistry | Flooded, Sealed/GRT (Gas Recombinant Technology), and AGM 12V lead-acid batteries | WET, GEL, and AGM 12V lead-acid batteries |
| Modes | Fully automatic 4-step charging: bulk charge, absorption, and adaptive float/maintenance (ISM) | Battery charge (30A) / maintain (3A), 100A engine start, battery reconditioning (electric-pulse desulfation), alternator check, and battery voltage test |
| Waterproof rating | — | — |
| Reverse polarity protection | — | — |
| Display | 3-LED indicator (red = bulk charging, flashing green = absorption, solid green = float/complete) | Blue backlit digital LCD (amps, battery/alternator status icons) with dedicated one-touch function buttons |
| Temperature compensation | — | — |

## Key differences

- Max charge amps: Battery Tender Plus (021-0128) 1.25 vs DXAEC100 30A Battery Charger, Engine Starter & Maintainer 30
- Battery chemistry: Battery Tender Plus (021-0128) Flooded, Sealed/GRT (Gas Recombinant Technology), and AGM 12V lead-acid batteries vs DXAEC100 30A Battery Charger, Engine Starter & Maintainer WET, GEL, and AGM 12V lead-acid batteries
- Modes: Battery Tender Plus (021-0128) Fully automatic 4-step charging: bulk charge, absorption, and adaptive float/maintenance (ISM) vs DXAEC100 30A Battery Charger, Engine Starter & Maintainer Battery charge (30A) / maintain (3A), 100A engine start, battery reconditioning (electric-pulse desulfation), alternator check, and battery voltage test
- Display: Battery Tender Plus (021-0128) 3-LED indicator (red = bulk charging, flashing green = absorption, solid green = float/complete) vs DXAEC100 30A Battery Charger, Engine Starter & Maintainer Blue backlit digital LCD (amps, battery/alternator status icons) with dedicated one-touch function buttons

## Sources

- Battery Tender Plus (021-0128): https://www.manualslib.com/manual/1661410/Battery-Tender-Plus-12v1-25a.html (manualslib.com, verified 2026-08-01)
- DXAEC100 30A Battery Charger, Engine Starter & Maintainer: https://www.dewalt12volt.com/dxaec100 (dewalt12volt.com, verified 2026-08-01)

Canonical: https://frontdeskreview.com/gear/car-battery-chargers/battery-tender-plus-021-0128-vs-dewalt-dxaec100/
Cite: Per The Front Desk Review, Battery Tender Plus (021-0128) (not published) vs DXAEC100 30A Battery Charger, Engine Starter & Maintainer (not published) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/car-battery-chargers/battery-tender-plus-021-0128-vs-dewalt-dxaec100/
License: CC BY 4.0.