Duracell D2A 2 AMP 12V Battery Maintainer / Charger Review

Average Reviews:

(More customer reviews)I wanted a charger to keep my car battery charged (but not overcharged!) while I am absent on multi-week trips.So far the Duracell 2 Amp charger seems to be working well.

It is a three-stage charger.The specification says that depending on the current state of the battery, it will do a fast charge to around 80%, then a slower charge to almost full, then finally move to a lower voltage "floating" charge to keep the battery near 100% without overcharging.

I used a multimeter to watch the charging process.My battery was mostly full to start with, so the charger started charging at 14.1 volts (the slow charge mode) and then after a few hours moved to 12.7 volts (for the floating charge).These both seem appropriate voltages.In particular, the floating voltage of 12.7 volts should be safe for long-term battery maintenance.

After about two days on floating charge, my charger's red charging light finally went off.Over the next couple of weeks, when I checked the charger, the red charging light was mostly off but I occasionally noticed it on.It looks like the charger is moving between off and floating charge as needed for sustained maintenance.

I'll have to see how the charger holds up under long-term use, but so far everything looks good.

Update November 2010: I've been using this for two years now and I continue to be very happy with it.It's pleasant to come back from a four week absence to a fully charged car battery, with zero hassles!

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Product Description:

The Duracell 2 AMP Battery Maintainer is ideal for keeping inactive batteries (such as those in an extra vehicle, boat or RV) charged up and ready for instant response by providing safe, steady maintenance charging between uses. It's built to withstand thousands of charging cycles and can stay safely connected for long periods of time without overcharging your battery. It is portable, lightweight, easy-to-use, and includes an accessory package to suit most types of battery connections. The Maintainer connects quickly to your battery via easy-to-use clip plugs, DC lighter plug or ring terminals to provide a complete charge of all internal cells.

Rapid charge technology for faster, more accurate charging.
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