Need to recharge and lost the charger I bought a lithium charger but not charging what should I do now?

Try a different battery. Chargers have tolerance limits and this battery could be on the edge. That should solve it. These links may help:
http://www.ti.com/lit/an/snva557/snva557.pdf Why does Li ion charging require very tight voltage tolerance
How to charge Lithium Iron Phosphate Rechargeable Lithium Ion Batteries
Charging at High and Low Temperatures

The batteries were discharged too low. A lithium battery should be recharged as soon as you see a loss of power.

No, the P110, 18V NiCad battery charger, will not charge a 18V lithium ion battery. You need one of the dual-chemistry chargers. If you have the Ryobi ONE+ batteries, you can get the P117 charger ($30) or a charger with an extra battery (P126) from a store like Home Depot. A 6 battery charger and a 12V in-car charger are also available.

I wish that I had better news for you.

Cindy Wells
(who has the Ryobi 12V drill and charger, a few of the 4V tools, and a number of the ONE+ 18V devices and chargers. The single chemistry battery charger is not used much any more.)

Lithium Ion batteries don't charge the same way ni-cads or ni-mh do. You need a lithium ion specific charger to charge them. (Some chargers do multiple types.)

Charge lithium battery

A. Charge with USB cable
Insert the lithium battery into your camera correctly, and connect your camera to computer with USB cable. The red LED of camera will be light on indicating that your camera is in charging status, the LED will be off when charge full.

B. Charge with supplied charger
Your camera is supplied a compatible charger for you, you are only required to put the battery into charger and charge the lithium battery directly from electrical outlet

http://www.vivitar.com/files_products/13/VC8025%20User%20Manual.pdf

The battery will power your equipment for 30 to 45 minutes, that is normal. What you're thinking of is the lifespan of a lithium battery. It with your battery will last 10 times longer than a regular NiCad battery. So you will be able to charge the battery and use it Hundreds of times before the Battery Life is depleted. Sounds like it's working as designed

Lithium-Ion batteries require careful charging and temperature monitoring while in the charger. Ryobi's Charging station monitors many functions and shuts off when the battery has gone through a complete charge. This is indicated by a steady Green light. Once the Charge indicator is a steady green the charger stops charging. With any battery It will slowly discharge and I don’t think the Ryobi will maintain a battery that is never removed. For example, if after a complete charge cycle if the battery was left there for 2 years and then you went to use it, it would likely be completely discharged. However if the battery charger is unplugged then plugged back in a new charge sequence would start. I lose power at my house about every 6 months or so. Once power is restored a new cycle would start and the charging cycle begins again.
Hope this helps and have a great day.

Sounds like your charger is only for NiCad batteries. With most brands, the new Lithium chargers will also charge the old NiCads, but the old NiCad chargers will not charge the new Lithium batteries. You will be very happy with the lithiums once you are able to fix the problem. As for Craftsman, buy Craftsman hand tools such as wrenches and sockets but I'd look elsewhere for battery powered tools.

It could be due to the fact that some rechargeable batteries are slightly different shapes and the nobbly bit on the + end doesn't reach far enough in, as it is the case with Maplin AA batteries.
In my case I placed a small drop of solder with a soldering iron on the + nipple and now they reach into any device.

NiMH tends to have a "memory". What this means is that the batteries will get used to being only charged and discharged a certain amount. What could be happening is that the battery THINKS it is charged when it is not... or.. it THINKS it is discharged when it is not. You can try to recondition them:

1. Charge them
2. reset the charger and charge again
3. put them in your device and drain them
4. let them sit, drain them again
5. recharge them
6. drain them again

Do this a few times. If you don't notice an improvement, you may want to consider getting a new set of batteries - I would recommend lithium rechargeables.