BL243 バッテリー — 3.8V 2900mAh (定格) / 3000mAh (標準)

It looks like you're referring to a Wholesale High-Quality 3.8V 2900mAh Lithium Phone Battery BL243 that is compatible with various Lenovo models such as Lemon K3 Note, K50-T5, A7000, A5500, A5600, and A7600.

This battery specification suggests it is a 3.8V rechargeable lithium-ion type with a 2900mAh capacity. It's commonly used to replace older or non-functioning batteries in these Lenovo smartphones. If you're looking to wholesale these batteries, you’d likely need to source them from authorized manufacturers or suppliers who can guarantee quality and compatibility.

Let me know if you need more information on this product or guidance on where to find suppliers!