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★★☆☆☆
Good concept, bad battery
The idea sounded great, solar-powered keyboard that never requires battery replacement ever again. The product delivered on that promise, for a short while. It was easy to recharge, dimly-lit room is sufficient to keep the power reading about 95%. Keyboard was responsive, stylish, light, types well.
Life was good until about 2 months of light daily use. For all intents and purposes, the "rechargeable battery" in the keyboard turned into a living hell. No amount of charging is enough to keep the power above 50%. Leaving the keyboard about 6 inches away from a 13W CFL (probably equivalent to 60W incadescent?) for 4 hours each morning is REQUIRED for the keyboard to be useable at all. Otherwise there is not even enough charge for keys to register.
I did two things:
a. I took the battery out, and saw that it was ML2032. Looked around, nobody apparently sells it at a reasonable price, on ebay and some other retailer, Maxell branded (same brand as the one in the keyboard) was about $10 apiece. And some UK seller selling cheaper looking unbranded ML2032 for $5. In my mind, if Maxell is this bad, I don't want to even bother with the cheaper looking one. Passed on that.
b. I contacted logitech, hoping they would just send me a replacement battery. All communication was through email, and they want me to send in the keyboard and pay for the shipping. No sir.
Either way I look at it, I'd be out of $10 or more.
Then I thought, isn't CR2032 the same sized battery? And it has more charge (CR2032 typically 200+ mAH, and ML2032 is about 60mAH), and can be obtained very cheaply (roughly 20 to 50 cents apiece from ebay). I thought I had just found the perfect solution until I read in the keyboard manual, that you should not put in a CR2032. It made sense, a lot of sense. After all, the keyboard "recharges" by converting solar energy to electricity and store in the battery, right? And what do those lithium button batteries have in common? "Thou shall not recharge them" because they can explode! I actually found a youtube video showing button battery explode while researching this issue, woah, don't want THAT to happen to my face while typing.
Update:
The battery is now available for sale in logitech's store for $5 each. It would have been nice if the batteries were provided free of charge because the keyboard is still under warranty, but at least you can get it if you want.
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November 2011 · Electronics · verified purchase