My aeg bews 18 angel grinder wont work. Battery is charged have tried different battery still not working

SOURCE: works off mains and battery but wont charge battery.

replaced the circuit board where it meets the battery

SOURCE: ryobi 18 volt batteries wont hold a charge

Ryobi batteries are specific to each Ryobi model, so please write down which model number or the original battery part number you have. How old are the batteries?
I had the same problem with many bateries I had at home, like cell-phone batteries and also some power tool bateries. Did not have any Ryobi power tools tho, so don't hold me acountable if this doesn't apply to your hardware:)
Many batteries have the "memory effect" which means that if the battery was not completely empty when it was set to recharge it might now only recharge to the level it was emptied to, so for instance if you used the power tool for 10 mins and the battery emptied to, lets say, 90% capacity, it might occure that the next time you recharge the battery it will only charge to it's 90% maximum...doing that many times lowers the maximum recharge capacity. As I heard the new Li-Ion batteries do not have this problem.
I hope this makes some sence as my english is not that good and it was a bit hard explaining my thoughts:)

SOURCE: Dell e1705 will not charge battery any longer

The problem with your laptop unfourtunately is not anything you can simply waive your wallet at, There area on the laptop where you plug in the power Adapter has a very small connector on the inside, this connector because of the nature of the cable and being pulled around and adjusted constantly causes the solder that hold the DC connection in place becomes damaged, sometimes if held in the right position it will charge, but this will only work for so long as the connector becomes more damaged by doing so. Your options are to A.) take the laptop to someone who can solder it back on (literally takes 25-30 minutes) but finding people who are willing to do it is not so easy, i recommend smaller computer shops with Uber nerds (look for the dude with the calculator watch) Option B.) this actually is something that dell covers under warranty as its not damage done by you directly, the damage is done with general use. I would at least try to contact them to see where you are with your warranty. C.) Call Dell's Spare Parts department in the event that your laptop is not in warranty and purchase a motherboard replacement ( seems extreme but its the only way to replace that proprietary connector without soldering it back on ). There is one more problem that could cause this, and that is that the motherboard in your computer has actually started to fail and is not getting the power to the battery, in which case you Have to contact dell, or find someone who will replace the motherboard for you most likely at an hourly rate. if this is the case Go hunting for Dell E1705's with broken LCD's for sale, you will save your self a ton of money, and swapping the motherboards out is really not that difficult, any computer repair place should have the ability.

This solution addresses all the known problems I've seen and should get you on the right path.

Good luck! Stay Classy :)

SOURCE: Battery will not charge/ keep computer on. laptop

Sounds to me like the transformer circuit that enables the batery to charge. If you have bought your machine within the last 12 months it should still be covered by warranty so go back to the supplier. If not covered I wouod still try as it is not beyond reasonable expecations that the machine will operate perfectly in very way for more than 1 year.

SOURCE: charging error 5 - battery not workiafter 4 calls and 4 different

Generic works fine, and that charger does too. If your charge light and dock light are on then you'll be okay.
Save cash, go generic!