(5-Pack) 3.6V 1200mAh ER3V Battery for Toshiba JZSP-BA01, R88A-BAT02W

And they're small little lithium batteries that come with about 3 inches of wire negative and positive pretty strong good for little projects etc. It's really good price for what they are long lasting as well that is all.

I made the mistake of assuming these were Lithium Ion and planned to use them in a circuit where I could recharge them. Turns out, they are Lithium Manganese Dioxide, which is not rechargeable. It is my own fault for not reading the description close enough or looking closely at the images that clearly show text that says "Do Not Recharge". Just a heads up so you don't make the mistake. That aside, I've only tested one of the five I purchased and it did produce the rated voltage. I stress tested it with a 50W 3.3 Ohm resistor which drew about 1.1A (4W) and it got uncomfortably warm, so I stopped the test after a couple of minutes. If your circuit requires that much current, this would not be the right battery for the application anyway. I just wanted to sacrifice one to see if the rated mAH was accurate. My plan was to include it inside a scale model aircraft to power some LEDs, to the small size is a very good fit.

Good quality batteries to keep old servo drives in service

I won;t use these "as intended" but instead I will cut the plugs off and use them in my magic props. They ssave me time and hassle because they come with wires professionally installed- instead of me hassling to solder my own wires to the batteries, these are done correctly (spot welded) and are much easier to get along with!!