(5-Pack) 3.6V 1200mAh PLC Lithium Battery Compatible with Toshiba ER3V JZSP-BA01 R88A-BAT02W(2 Pin Black Connector)

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