Question about Ryobi Multi-Volt Battery Charger
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
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"
Posted on Jan 11, 2012
Are the lights blinking or steady?
On my Ryobi battery charger (dual-chemistry), if the red and green lights are both blinking, the battery is damaged and will not accept a charge. Replace the battery and dispose of the old one properly. (Places like Home Depot and battery shops will take the old battery for recycling.)
The older NiCd battery charger that we had indicated a bad battery when the yellow and green lights came on.
These batteries do have a finite number of times that they can be recharged. When they start to fail, one cell usually will go bad. It's generally not worth trying to replace one cell.
Manuals for the Ryobi One+ tools are http://www.ryobitools.com/catalog/18v_oneplus#/overview . Click on the tool or battery pack to get the Owner's Manual. (Manuals are not on the charger page.)
On rare occassions the charger can fail. If a new battery doesn't charge, then replace the charger.
I hope this helps.
Posted on Jun 24, 2011
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