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"
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.
Cindy Wells
Based on the "steady lights", I think you have the older charger. If the yellow and green lights are steady, you may have a bad battery or a completely discharged one. If the red light doesn't come on after 30 minutes with the battery on the charger, then you have a bad battery. (To me the lights look yellow, green and red (from left to right). I've assumed the the light I consider yellow is the one you call orange. The red light is marked Rapid Charge and the green is Charged.) As I said before, if a new battery isn't charging, then the charger itself is bad. (Since you see the lights, it isn't the power supply of the charger.)
Only the new charger has blinking lights for the status information.
I hope this helps.
Cindy Wells
(we have both the old one for NiCd batteries only and the dual chemistry charger.)
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Most battery charger have Orange or yellow for the status indication, you may try keep charging for long if its the first time and see...
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the lights are not blinking.
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