Never charge batteries overnight. Disconnect charger if batteries become hot or puff. Arrma ARA311048 28T /28Tooth Mod1 Safe-D8 Pinion Gear Product Details:This tough steel 28T Mod1 Safe-D Pinion Gear is the perfect part to carry in your RC tool box Features:Strong and durable steel for long-lasting performance in extreme RC conditions - Precision manufactured wide tooth profile for smooth operation - 'D' shaped hole to match motor Never exceed the recommended charge rate (C rating). Product Description 28T Mod1 Safe-D8 Pinion Gear Safety Warning Warning: read and follow all precautions and instructions before use. ARRMA KRATON C-ARA5808V2T1 1/5 8S EXB Monster Truck – Smart ESC & AVC Control Arrma ARA311049 29T Mod1 Safe-D8 Pinion Gear Never short-circuit or old batteries or related wires in any way. Always use chargers compatible with lithium polymer batteries. Dispose of batteries properly. Safe-D8 Pinion Gear Arrma ARA311050 30T Mod1 ARRMA Replacement Part If this occurs, observe the battery pack in a safe area for 10 minutes.