Black+Decker · Updated August 2026
BM3B Battery Charger/Maintainer: full specs
BM3B Battery Charger/Maintainer. Every price and spec below is linked to its source and dated — no guesses.
Source: manualslib.com verified verify in ledger
The BM3B Battery Charger/Maintainer has no published US price yet. It earns a Bronze Deskmark — 2/100 pay-blind standing, #10 of 13 in class.
Verified Aug 1, 2026 · figures linked to their source in the table below
Is the BM3B Battery Charger/Maintainer a good buy?
On the spec sheet, its max charge amps of 1.5 is below the median of the 13.
Specifications
| Price (US) | Not published No manufacturer store page exists for this legacy accessory (Black+Decker automotive chargers are sold only through retailers); Home Depot, Lowe's, and Target retailer pages returned 403/blocked responses or no matching listing, so no current USD price could be confirmed. |
|---|---|
| Brand | Black+Decker |
| Released | — |
| Max charge amps | 1.5 |
| Voltage support (V) | 6, 12 |
| Battery chemistry | — |
| Modes | Fully automatic 2-stage charging (bulk charge then float/maintenance) via high-frequency pure DC current; manual 6V/12V selector switch |
| Waterproof rating | — |
| Reverse polarity protection | — |
| Display | Single LED charge-status indicator light |
| Temperature compensation | — |
Source: manualslib.com (verified 2026-08-01). VERIFIED via the Black & Decker BM3B instruction manual (ManualsLib mirror): a 6-volt/12-volt automatic battery maintainer rated 1.5A (per the model's widely-used retail title "1.5 Amp Battery Maintainer/Charger", consistent with the manual's description of the unit), using color-coded ring-terminal clamps plus a DC accessory-plug option, high-frequency pure-DC charging, wall/flat-surface mounting holes, and a 2-year home-use warranty. The manual explicitly instructs never to immerse the device in water and not to expose it to rain/snow, but states no formal IP rating -> waterproof_rating null. Battery chemistry compatibility (AGM/Gel/flooded) is not itemized in the retrieved manual excerpt -> left null rather than assumed, since Black+Decker's automotive chargers have historically been sold in both flooded-only and AGM-compatible variants. Downloaded and visually inspected the manufacturer product photo, confirming the red/black housing, a 6V/12V toggle switch, and a small status-LED window; reverse_polarity_protection and temperature_compensation are not stated in the retrieved excerpt -> null.
Frequently asked questions
How much does the BM3B Battery Charger/Maintainer cost?
The BM3B Battery Charger/Maintainer has no published US price as of 2026-08-01.
What are the BM3B Battery Charger/Maintainer's key specs?
BM3B Battery Charger/Maintainer (Black+Decker): max charge amps 1.5, voltage support v 6, 12, modes Fully automatic 2-stage charging (bulk charge then float/maintenance) via high-frequency pure DC current; manual 6V/12V selector switch, display Single LED charge-status indicator light. Full sourced spec sheet verified 2026-08-01.
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