trickle charger

例句：

1. 1.The battery needs to be charged frequently to ensure it lasts for a long time.
   电池需要经常充电以确保其持久使用。
2. 2.The old phone is running low on battery, so I need to charge it now.
   旧手机电池快用完了，我现在需要给它充电。
3. 3. The car's battery needs to be checked regularly to prevent any leakage.
   汽车的电池需要定期检查以防止泄漏。