Panasonic VL2020, - (Horizontal Mount) - VL-2020/HFN Lithium Battery Rechargeable (Secondary), VL 2020 3V 20mAh Coin, 20.0mm

it was a hack that saved me over three hundred dollars if I had to get a replacement key from the dealer. check it out on youtube

it works perfect.

Dont waste your money!!! WRONG type !! I wish sellers would take actual photos of their products. I purchased these because the battery in the picture has the connectors pointing in the same direction and are flat not bent up therefore I cannot connect these to my welding helmet circut board . I will have to return.

I bought this battery for my husband BMW X3.It works fantastic.It's much cheaper than buying a brand new key from thedealer which cost about $200 to $300 dollars

Good quality battery, quick delivery!

Purchased this item I. April and with a few alterations I was able to mount it into my key fob. Only problem is that in less than 6 months I'm having to replace the battery again. Gonna look for another battery.

Fits very well

If u are replacing battery in BMW KEY (diamond shaped), u need the ML2020 battery that has 90degree offset.