my laptop is acer aspire one, i bought it almost 4 years ago. two months ago the battery showed "consider replacing your battery" and then one month ago suddenly showed "plugged in, not charging" until 0% available. at that time, my laptop still can be alive for several minutes without charger. but now my laptop can't turn on without charger. so every hours it plugged in but not charging. is it dangerous? are there some solutions be sides buy a new battery? the price is very expensive and i am still not work yet. pleaseeeee help meeee