This is a 400mAh LiPo which fits the 29 and 38mm SMART Sleds.  

Up to (3) of these will fit in one integrated 9v battery holder on our other SMART sled products. 

Pre-soldered connectors which mate to the battery are also available

Due to shipping restrictions, ONLY (3) LiPo batteries can be shipped per order. If more than 3 are ordered, the order will be cancelled and purchase refunded. This is the only way I can handle lithium battery sales at this time.