This is a conveniently packaged reverse-polarity CR2032 battery with wire leads and JST connector already attached (select from two available connectors.) These are lithium metal cell batteries (non-rechargeable). They are usually used for remote controls, computer motherboards (CMOS) for PCs, laptops, notebooks, etc. They are also great for powering brush robot, bristle bots and toothbrush bots projects. Each battery is 3V and 210mAh.
Please note that these batteries are non-returnable so please ensure that you buy the correct battery for your equipment. Look at related items for the same battery with a more common polarity.
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