Battery won't hold charge. Replaced original under warranty. Second worked first day back. Was on supplied charger two days, and would not start. Checked it on a friends charger...says code FO3, open or bad cell, so would not accept charge.

If it only worked a few days, you may be able to get it replaced or repaired free under warranty, or a refund.

Use Google to find warranty information if you no longer have the instructions.

Google

You can put the software right, with a reset. Hardware errors and batteries won't change a bit when you use the reset button. When the battery is bad, and it looks that way, just return the Fitbit and ask for a new or new battery. It still should be under warranty. If the warranty is only 90 days for the battery, never again buy a Fitbit in the place you are living. In Europe electronics have a warranty of 24 months.

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.

Remove the battery and check the voltage on the battery, if low try to JUMP charge, if not replace. Also check the charging voltage with the adaptor connected to the latptop. If there is no voltage then the charger must be checked.
However if the battery and adapter seems good then the mother board is a suspect and it is ideal to get the help of Tosibha service for estimation.

The replacement battery should have come with a WARRANTY, e.g., 30 days or 90 days or 1 year.
Exercise that warranty to get it inspected/repaired/replaced.

How old is the weed-eater? Has its warranty expired? It could be a problem with the battery-recharger.

Two things could have happened. The battery got slightly loose, hence it's not charging and turning on, just remove the battery and put it back in. If that didn't fix the problem, the charger may be faulty and the battery went flat. You can check this by feeling the charger if it gets warm while plugged in. If it is faulty and under warranty take it back for a replacement. If it's not under warranty, try getting a replacement battery from Ebay.

The small batteries (17 Amp hour I believe) are notorious for lasting a year and often much less. I consistently replace the original OEM batteries supplied with this chair at the 6 month point. The manufacturer warrants these sealed gel lead acid batteries for only 6 months. Try the AGM (advanced glass mat ) batteries and you should get better life out of them. They might be more expensive at retail pricing but your insurance should pay for the better batteries in my experience. Make sure the charger replaced under warranty is the correct amperage for these small batteries otherwise the output could burn the battery plates.

Sure! read your manual! It says "don't leave the charger hitched up longer than 8 hrs!" the battery heats up and the internal overload opens so it starts to discharge. jeez!

There could be a problem with either the battery or the charger itself. Try to use another charger. If the phone did not charge, then you might want to borrow a battery to see if another battery will hold a charge.

If the phone is still under the warranty, take advantage of it and have a free test or repair from Motorola.

Have a great day!