- Capacity: 900mAh - Li-ion Battery - Compatible Model: K750, D750, D750i, K750i, K600, K750c, W800c, S600i, Z520, Z520i, W600, J220a, J220c, J220i, J230c, J230i, K310a, K310c, K310i, K510a, K510c, K510i, K600i, K608i, K610im, K758c, V600i, W300c, W300i, W700c, W700i, W710c, W810c, W850i, Z520c, Z525a, Z525i, Z530c, Z530i, Z550c, Z550i, Z710c, W810, Z300a, W600i, W550i, W800, Z520a, J210i, K610i, W350i, W800i, W810i, W710i, Z710i - Compatible Battery Part Number: BST-37 - RoHS approved for toxic free. - CE and ISO9001 Certificate for quality assurance. Battery Distributor: Digi-Tech