Generally recharging the Home Plus battery should take about an hour. How long it actually takes depends on other factors such as how low the voltage is when you begin and the temperature of the battery. Hot and Cold will cause the battery to take longer to charge and is NOT recommended. See: Operating Temperatures Hot and Cold
CAUTION: The battery should always be allowed to come to room-temperature before charging. Charging a hot or cold battery might delay charging or damage the battery. For best results, charge the battery at temperatures between 50º and 80ºF (10º-30ºC).
Disclaimer
The advice given above is general in nature and you are responsible for the safety of your batteries. SwiftPaws is not responsible for any direct, indirect, special, or consequential damages and personal injuries, including that to life, and health, resulting from the customer’s application and use of batteries sold by SwiftPaws.com.