Note: This battery is customized design for Retevis RT21 RT21V two way radios, please check your walkie talkies models before placing orders. Hot Spots: High Capacity: 1100mAh Rechargeable Replacement Battery Perfect back up for your original battery Safety Long term use Specifications: Type: Li-ion Voltage: 3.7V Capacity: 1100mAh Weight: 68g (2.4oz). Applicable radio: Retevis RT21 RT21V Package Including: 1 x Retevis RT21 Two Way Radio Battery Retevis RT21 RT21V Car Charger Battery Retevis Shoulder Speaker Mic Retevis 5-Port USB Wall Charger Buying Options Buying Options Add to Cart Customer Reviews 4.6 out of 5 stars 9 4.2 out of 5 stars 140 4.6 out of 5 stars 92 Price — no data — no data $25.99$25.99 Compatible radios Retevis RT21 RT21V Retevis H-777 RT22 RT21 Baofeng 888S UV-5R and more Walke talkeis(better under 5V 8A), such as Retevis H-777 RT22 RT21 RT27 RT7 H-777S RT45 and more Features 3.7V Voltage; Li-ion Type; 1300mAh Battery capacity K Head 2 Pin & 3.5mm Audio Jack Universal Compatible & Smart Technology