Ryobi charger model bd0547 (140237023) not charging battery

If you have your receipt, check with Ryobi to see if it is still under warranty. It comes with either a 2 or 3 year warranty, depending on when it was purchased. If it is still covered, get it replaced/repaired. If it is not, buy the P117 charger. $30 at Home Depot. It has a 90 day satisfaction guarantee. If it charges your batteries properly, you're good. If not, bring it back if you don't like/want it. My P113 won't get out of test mode now, or charge Lithium batteries anymore. So I bought the P117 yesterday. Works great, and it's a lot cheaper than new batteries! And it has a 3 year warranty.

They look different in their shape where the battery goes so I would say no. To be safe always use the charger from the same manufacturer. There are a few different types of batteries too so it is always best to use the model number of your original charger to search for the replacement.

SURE. DON'T WORRY IT WILL BE CHARGED

Lithium Ion batteries don't charge the same way ni-cads or ni-mh do. You need a lithium ion specific charger to charge them. (Some chargers do multiple types.)

most recommend taking the battery off the charger and you don't have to unplug the charger all the time.

The air holes on the bottom of the batteries are there for the battery to vent. Downside is, these vents can also allow moisture to get in and prevent contacts from letting the battery charge and causing the "defective" display on the charger.

I work on pool and spa equipment and I had dropped my batteries in a small puddle of water where I was working, both went dead immediately and both showed "defective" on the charger even after drying them out for a few days.

Tried using a can of air and gave each of the vent holes several shots... The batteries charged and are now working perfectly.

I'm sure even overnight condensation could be the culprit for a charger to display "Defective"

Any battery left in a charger is still hooked up to a circuit. Depending on the charger this can mean a slow discharge is possible. Ryobi's Maintenance Charge Mode means the charger will 'refresh' the battery at regular intervals, usually every 30 days. A battery's lifespan is determined by how many times it is discharged/recharged so to get 'the longest possible battery life' it is desirable to reduce the number of times a battery is recharged. One way is to use the battery until it is dead or near so another is to remove the battery from the charger when it's fully charged to reduce the number of times the charger refreshes the battery.

In some model the FUSE got burn.But if this is not your case one or both,batts and charger are burn.Try first to change the batt, then if this not work, change the charger.

Use
AC / DC Power Adapter Replaces Ryobi One+ Batteryhttp://lcdpayless.com/ryobi_one_power_adapter.php

I've open the charger and found that Q4 is open. But they have removed the part number from the component so you can't get a replacement.