Is it about the size of 1/2 a AA battery?

Are the contacts both on the top or top and bottom?

If they are on the top and bottom and it's half the size of an AA, its a 14250 cell

https://www.amazon.com/Rechargeable-Lithium-Battery-icr14250-300mAh/dp/B074L6Z5BC/ref=sr_1_27