Battery Type: LiFePo4; Voltage: 3.7V; Capacity: 1Ah to 20Ah (Single Cell); Size: different -- Product Application ---Blue-tooth, MP3/MP4/MP5, PDA/Mobile phone, Portable DVD, PMP, GPS, Laptop, Digital Camera, Cordless Telephones, R/C planes, Power tools, Backup power, Costume etc... The following model is part of our model, for other models can be tailored according to requirements! Cylinderical ...