说明书上不是写4小时么？
第一次使用前是24小时，然后每次就是4小时。充一次可以用三天，每天泵三到四次。

因为我是买的2手的，人家battery没用过，我也不知道
所以就直接拿来用了，后来发现BATTERY怎么都充不满
所以才问他，他说没用过，所以我才充的24小时，不知道是不是因为这样BETTERY有了问题。

第一次24小时， 之后就3，4个小时就可以了，
第一次充电的时候屏幕会闪一个东西，之后就没有了.下面是说明书里写的

4. Prior to first use, charge the battery for 24 hours. If necessary, the pump can be used during
this period with the power cord only. The pump will display the message while
the pump is in the initial charging mode. For best results, allow the pump to initially charge
uninterrupted for 24 hours. After the 24-hour initial charge, subsequent charges will take
approximately 4 hours. You should not need to remove the battery unless replacing.
Tip: If the initial charging mode is interrupted (pump is unplugged/battery is used) or if the pump battery is removed
and reinserted, the display message will flash, indicating the pump needs to complete the charging cycle
(18-24 hours) prior to battery use.