Black & Decker LITHIUM CHARGER 14.4v to 18v . 90539541. fits A1518L, HP1884L

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metabo sbp 18 plus battery

for online vendors.

If you are using nicad batteries remove from charger when fully charged. Leaving the battery in charger will damage battery and you will need to replace it.
Black Decker Battery Charger Instructions Hunker

This worked for me .. Put battery in charger , unplug and plug in charger repeatedly until it charges

check output on transformer, 2 check pcb ,could be a regulator

Either the charging adapter is faulty or the battery is worn out.

If the recharageable battery is more than 3 - 4 years old then the battery could be worn out.Rechargeable batteries have a finite number of charge and discharge cycles andwill lose their charge capacity over time, i.e. won't charge to 100% andgradually the charge reduces until the battery won't charge up at all. OR Thebattery shows a 100% charge but when the adapter is disconnected the batterydrops off to zero capacity in a very short time. If the battery drops to anunacceptable charge level then the battery needs to be replaced.

put it on the charger and plug the charger into an electrical outlet ...

Batteries are only good for about a year, if they are older than that, take them back to the store and see if they are guaranteed at all, (all Ryobi tools and batteries have a date code on them, and they are all guaranteed for 2 years, a little plug for Ryobi,) that is all I buy now days, they work great. So, to check your charger, you will need a volt meter set on 12 or 20 v dc, and see if the charger is putting out, if not, then, the cost of a new ryobi might be the same as the fix for the black and decker. That is if you use the thing, we use our cordless tools every day and charge them every night, hope this helps.

There are light on chargers, some red some green, red means chargeing, green mean charged.

This isn't true because I have a second charger and it works fine

The light will turn green once it is fully charged.