Will not stay charged

it sounds like the battery has seen better days. a battery will get a "memory" and after while it could fully charged as far as the charger know but only hold a little charge. with the advices in batteries they shouldn't do this but they all do wear out of time. I would get a new battery, and everything should be just fine. With the any new rechargeable battery you want to make sure that you charge it completely and drain it the whole way before recharging.
Best of luck
Mark

Well your battery problem is quite simple. Litium batteries have a life and as the cells deplete, they will not hold as much charge as they once did. The part number for your unit is Worx WA3512.1 and can be purchased for about $53.00. As far as the spool retainer clip is concerned, you will be looking for a hard to find part. Here is the good news, you can purchase a brand new WORX GT WG150.1, which is the model you currently have, for only $95.00 on Amazon. I hope this helps you and let me know if I can be of additional assistance.

24 hours,then run the trimmer till the batteries are dead.That helps them to hold their charge longer the next time.

How large is your yard? On a small yard (like a townhouse front & back yard) the trimmer should last long enough to do the yard a couple of times before needing to be recharged, but it depends on the individual yard, how many weeds you have, and whether you keep it running a long time.

If the trimmer charges at all but not for a very long time, it's either the charger or the battery. Check the charger when it's charging to make sure the red light stays on -- if it goes off or blinks, you need a new charger. If the charger light stays on but the battery doesn't hold a charge, you need a new battery.

Hope that helps!

Buy another one. It is a common problem. Pansasonic is not a reliable brnad any more. I used to like it 20 years ago, but now I have got a Broken Plasma TV and a Broken brand new trimmer that doesen't charge as well. I will have to buy another brand now.

The battery could be damaged due to excessive charging / under charging or most likely the charger itself is faulty.

Sounds like faulty batteries , take it back to the store where you bought it.

There is a screw underneath the Toro label.   I learned the hard way.

Does it not hold a charge, or will the charge not indicate "fast charge"? I had to apply a initial jump charge on the battery to get it up to 20 volts, then I put it in the Ryobi Charger, and it started charging it.