Is there a way to charge laptop batteries when not connected to your laptop?
okey, if you want to charge your laptop battery, i suggest you charge it from your laptop adapter. so , you can see that some charger for mobile phone, shaver, ect. may has the same output volt to your laptop battery volt, but ,if the conect between the charger and batter is not inseparably close, the battery may discharge at the same time. this may decrease the life of your laptop battery.so if you don't want to work with the battery, keep the adapter connect with the laptop. or if the laptop battery is poor, change a new one.
I reversed the polarity on my boat batteries by wiring a bilge pump backwards now the polarity of the batteries are reversed and I can't charge them?
When you first purchase a laptop, make sure to allow the battery to fully discharge before charging it as this allows the battery not to have any dead spots in it. After it is fully discharged, completely charge the laptop, after that your good to go. Wall charging is the best method as it is a slow charger that will end up extending your batteries overall life.
Most batteries of any sort come with some charge, though almost never to their full capacity, and should be charged before their first use. Charging them all the way wouldn't do any good, since the charge naturally drains after a few weeks or months, thus it would be more expensive to keep them in inventory.
Do not let the battery run down until dead. This shortens the life of the battery, especially car batteries. Some lithium batteries, such as for laptop PCs, this is actually good for the battery, but that's the exception. For a vehicle, boat or motorcycle, keeping the battery charged on a trickle charger to maintain 100% charge is the best way to extend the life.
At least 12 hours if you've just bought it. You can use the laptop while it is charging. I have had laptops connected to their charging device plugged into a wall socket for weeks. Some but not all of them have had problems with their batteries loosing capacity. I suspect the deterioration is due to insufficient "intelligence" in the charger. First time charging of modern Lithium ion batteries: often at least 12 hours (see the…