Many laptop users have this problem and we will answer now:
The answer is yes and no, depends on the situation.
Having a fully charged A1078 battery and connected the laptop is not harmful, because as soon as the A1079 battery reaches 100% PowerBook G4 Battery charging stops receiving energy and this energy is bypassed directly to the fuel system of the laptop.
However, there is a disadvantage in maintaining the PA3383U-1BRS battery in its socket when the laptop is connected, but only if you currently suffer from excessive heating caused by the hardware of the laptop.
Then:
In normal use, if your laptop does not get too hot (CPU and hard drive of 40 º C to 50 º C) the PA3451U-1BRS battery should remain in the socket of the laptop;
In an intensive leading to a large amount of heat produced (Games, temperatures above 60 ° C) the Compaq Evo N610C Battery must be removed from the socket in order to avoid heating effects.
The heat, including the fact that 100% charge, is the great enemy of lithium Latitude D620 Battery and not the plug, as many might think so.
If you intend to purchase another Acer Aspire 3000 battery, it's recommended that you do it only when the current VGP-BPS9A/B battery is very degraded. If it's not the case, the non usage of a battery leads to its degradation.
If a spare BATCL50L battery is purchased and won't be used for a long time, the above storage method should be used.Besides that, when purchasing a Dell KD476 battery you must pay attention to the manufacturing date.