Depending on the battery, you can expect a full charge to take anywhere from 8 to 12 hours. However, the time is cut by more than half if you use a Worx fast charger. Batteries with a lower Ah are purported to tackle about a quarter of an acre of yard space per charge, while higher options may cover up to three quarters of an acre. To maintain battery life, only begin to use it at full charge. Once power starts to wane, recharge it fully. Keep your battery away from extreme heat, cold, and moisture.