Question about Dewalt 7.2-18.0 Volt One Hour Charger

1 Answer

Cannot recharge 18v battery, place battery in charger red light flashes slowly then after a minute flashes fast and won't continue to charge, remove then replace and again slow red flash for a minute and same thing happens, is it the battery or charger. Thank you John Moore.

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  • jon_cha May 18, 2011

    yes thank you, problem solved.

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  • Dewalt Master
  • 75,822 Answers

You will need to replace the battery it is defective.

Posted on May 18, 2011

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1 Answer

18v 12 cordless trimmer/edger. Why won't it start?


the trimmers switch may be faulty.

CHARGING THE BATTERY PACK
Battery packs for this tool are shipped in a low charge condition
to prevent possible problems. Therefore, you should
charge them until the green LED on the front of the charger
comes on.
NOTE: Batteries will not reach full charge the first time they
are charged. Allow several cycles (operation followed by
recharging) for them to become fully charged.
CHARGING A COOL BATTERY PACK
See Figure 3.
If battery pack is within normal temperature range, the red
LED on charger will come on.
NOTE: If the charger does not charge the battery pack
under normal circumstances, return both the battery pack and
charger to your nearest Ryobi Authorized Service Center for
electrical check.
n Charge the battery pack only with the charger provided.
n Make sure the power supply is normal household
voltage, 120 volts, 60 Hz, AC only.
n Connect the charger to the power supply.
n Place the battery pack in the charger aligning raised rib
on the battery pack with the groove in the charger.
n Press down on the battery pack to be sure contacts on
the battery pack engage properly with contacts in the
charger.
n Normally the red LED on charger will come on. This
indicates the charger is in fast charging mode.
n Red LED should remain on for approximately 1 hour
then the green LED will come on. Green LED on
indicates battery pack is fully charged and charger is
in maintenance charge mode.
NOTE: The green LED will remain on until the
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n If both yellow and green LEDs come on, this indicates
a deeply discharged or defective battery pack.
Allow the battery pack to remain in the charger for 15
to 30 minutes. When the battery pack reaches normal
voltage range, the red LED should come on. If the
red LED does not come on after 30 minutes, this may
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replaced.
n After normal usage, a minimum of 1 hour of charging time
is required to fully recharge battery pack.
n The battery pack will become slightly warm to the
touch while charging. This is normal and does not
indicate a problem.
n Do not place the charger and battery pack in an area of
extreme heat or cold. They will work best at normal room
temperature.
NOTE: The charger and battery pack should be placed
in a location where the temperature is more than 50°F
but less than 100°F.
n When batteries become fully charged, unplug the
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Source(s):http://toolboyworld.com/eBay/Ryobi_P110/...

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Just bought a Ruobi drill with 18V Lithium Batteries. Been chatging for over an hour. Still not charged. Just the bottom Green light stays on. Is this normal? How long does it take?


The Ryobi charger will flash green as it charges and then remain steady or slowly flashing green when fully charged. Flashing red means testing and if it remains steady or slowly flashing red it is defective.

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Black & Decker Cordless Drill will not charge battery


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.

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Red and green flashing lights on 18v lxt charger


Batteries don't always look degraded but if they've been in use for a while or have a bad cell, they will show up bad on the charger and it won't charge them. The only way to test the batteries is to try to charge them on another charger. If the batteries show defective on another charger, they are bad and you'll have to replace them. Also try to charge some batteries you know to be good on your charger to see if it's the problem. If your batteries charge on another charger, your current charger is bad and they don't have any replaceable parts in them so you'd be looking at replacing it.

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Revive drill driver battery packs


Rechargeable batteries do have a lifespan, they won't recharge forever. If you have fully discharged the batteries then fully recharged them and they still don't have full power or they only last a couple minutes then they are done. If they won't charge or the charger shows them as defective, the only fix is to replace them.

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Brand new hitachi 18v, one battery charged fine the second is completely dead it was in the drill from the factory and the charger won't recognize it when attached.


I have just had a similar issue I left the drill unused for a period and when i placed it in the charger the charger showed the battery as charged after about 15 secondseconds.

Following a internet search i found a site that suggested for a imlar problem with a camera jump starting the low battery with a 9 v battery. I had a spare from the drill which was fully charged so placed a contact from + to + and - to - and held for about 2 mins. I then placed the battery back in the charger and it started charging. Running the battery down as we speak to recharge again well worth a try. If you dont have a spare maybe the 9 v would work

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I accidentally left my camera on, and the battery died. Later, when I plugged it in to charge, the charger light just binks orange continuously. The camera won't turn on at all, and I can't get the...


I think the battery was already damaged,a rechargeable battery once you use it,it needs to recharge again so that the battery memory will stay longer.use a new one,regards....

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Ryobi charger model # 140295003 has a red and yellow light. When charging red light is on what does the yellow light mean? Also how long should the battery be left in the charger?


Completely wrong. Quoting from the user's manual:

"The charge indicator light (LED), located on the charg- ing stand, will light up red and glow when the char- ger is properly connected to power supply. This light indicates the charger is operating properly. It will remain on until battery pack is removed from charging stand or charger is disconnected from power supply.

After normal usage, 3 hours or less of charging time is required to fully recharge battery pack.

If both red and orange LED indicators glow, the battery pack is deeply or completely discharged, and 6 hours or longer of charging time is required to fully recharge battery pack.

Note: If charger does not charge battery pack or orange LED continues to glow after more than 30 minutes of charging, return battery pack and charging assembly to your nearest Ryobi Authorized Service Center for electrical check."

So to summarize: red = charging. orange (yellow) = fully discharged battery. orange after 30 minutes - bad battery or bad charger.

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1 Answer

After placing my battery in the charger it flashes red fast after a few minutes


Sometimes the charger needs to be reset! there is a procedure for tricking the charger into giving the battery a forced charge. Sometimes this will shock the cells back to life. It is a temporary fix! the thermistor inside of the battery may also be bad. Goto Http://www.Batterypartsonline.com the have the thermistors and any other parts you might need!

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