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So you’ve got your AA-battery flashlight (maybe even TM’s #3 favorite; see 11/12/09), or your AA-battery digicam for those shop shots, or a  Minty Boost (TM 7/10/09), or any of the approximately eleventy bazillion things around the house that use AA or AAA batteries, and you’d like to use NiMH rechargeables instead of going through packs of alkalines. The Maha Energy PowerEx MH-C9000 is a charger and analyzer for NiMH and NiCd AA and AAA batteries. Its four independent slots have five modes of operation: charge (at a selected rate), discharge (at a selected rate), cycle (perform discharge/charge up to 12 times), break-in (charge at 0.1C for 16 hours, rest for one hour, discharge at 0.2C, and finally recharge at 0.1C for 16 hours; for new batteries and those stored for more than three months), and refresh & analyze (charge, rest for one hour, discharge, rest, and recharge; for batteries stored more than two weeks but less than three months, or for batteries showing poor performance; the refresh & analyze mode can also be used to select and match battery capacities). The MH-C9000’s digital display shows capacity, voltage, time, and current. The unit has many, many programming options (a bone of contention in some reviews).

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The MH-C9000 costs around $50 (and some vendors, like Thomas Distributing, often have sales that include a carrying case or batteries).

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MH-C9000 WizardOne Charger-Analyzer [Manufacturer’s Site]
Via Amazon [What’s This?]
Street Pricing [Google Products]

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7 Responses to NiMH AAA/AA Battery Charger

  1. Mike Yancey says:

    Maha makes some great chargers. Best I’ve found so far (and I’ve had several chargers that were crappy).

    The only one I can recommend that’s better is the MH-C808M, which charges AAA, AA, C, D.

    http://www.mahaenergy.com/store/viewItem.asp?idProduct=408

    Looks like it’s gone up in price.
    I’ve had a few NiCad AA cells that I thought were dead come back on this.

    Mike Y
    Dallas, Texas

  2. John E. says:

    The La Crosse BC-9009 has the same functions, is cheaper, and comes with 4 AA and 4 AAA batteries to get you started for $39 at Amazon. I have it and have been very very happy with it….I have kids so I go through alot of AA.

    http://www.amazon.com/Crosse-Technology-BC-9009-AlphaPower-Battery/dp/B00077AA5Q/ref=sr_1_1?ie=UTF8&s=electronics&qid=1259612198&sr=8-1

  3. Dr_No says:

    If you are going to be using them in any flashlights that you have laying around waiting for an emergency, you might want to use those fancy NiMH batteries like Sanyo Eneloop that dont self discharge as much.
    http://toolmonger.com/2007/12/19/dealmonger-8-pack-eneloop-rechargable-batteries-15/

    There is nothing worse than grabbing a torch only to find the rechargable batteries have gone flat by themselves since you charged them a few months ago.

  4. Brice says:

    Emergency flashlights always get Lion batteries at my house.

  5. SharkBreath says:

    I have their big charger for all batteries. I’m quite happy with the overall performance of it. The conditioning cycles really help cur down on battery termination.

  6. Ted says:

    I second the LaCrosse BC-9009, it is great charger, easy to use, solidly built, lots of features, and has a separate display (voltage, current or capacity) for each battery in the charger.

  7. deasy says:

    nop, lacrosse chargers are cheap, no comparison possible with a maha c9000.

    Check these pcb. The maha looks really more professional.

    I recommand people to stay away of lacrosse chargers with cheap electronics like it, it doesn’t worth the price they sell it at all.

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