The Tattu Classic 850mAh 4S HV battery is designed for compatible 3–4 inch FPV drones, including freestyle, cinewhoop, and compact park-flyer builds. Its compact size, 76g weight, and XT30 connector make it well suited for FPV setups that require a balance of lightweight design and high-power output.

A 15.2V 4S HV battery uses high-voltage LiHV cells with a nominal voltage of 3.8V per cell, compared with 3.7V per cell for a standard LiPo battery. The higher-voltage platform can provide stronger power output, but the FPV system and charger must support 4S LiHV batteries.

The Tattu TA300 8-Channel Smart Charger is a recommended option. It supports 2–4S LiPo/LiHV batteries and allows multiple FPV batteries to be charged independently. Always select the correct LiHV charging settings and confirm connector and balance-lead compatibility before charging.

Confirm that your FPV drone supports a 4S LiHV battery and XT30 connector. Check the battery dimensions, weight, connector polarity, ESC and motor voltage ratings, and charger settings before use. Do not use or charge the battery if it is swollen, damaged, or shows abnormal voltage.