Recently bought the new li-ion set...both batteries will not charge; charger display says the're broken; after 5 mos??? Bought new battery and it works fine

Yes you can. On tools, 18 volts is 18 volts. Tools don't 'know' how the power is being created, either by Ni-Cad or Li-Ion means. Chargers are totally different. Most Li-Ion chargers can charge older Ni-Cad and some Ni-MH batteries but older Ni-Cad chargers will charge Li-Ion battery untill they overheat and sometimes start on fire because older chargers can't detect when the Li-Ion batteries are full.

That is true the One+ 18V Li-Ion battery packs will work in any One+ 18V Ryobi tool. However the Lithium ion batteries will not charge in the original P110 NiCd charger. You will need one of the the new series Ryobi One+ 18V "dual chemistry" chargers for that. The will charge both types of battery packs.

It takes over 7 hours to charge, so did you leave it charge overnight?

But while the original battery is chargable, disposable replacements are not. Here is what the manual says:

{ ...
The supplied battery is a Li-ion battery. It charges while in the camera using the supplied charger. The camera can also use a Duracell CP1 disposable Li battery, which has the same form factor as the supplied Li-ion cell. HP claim the Li-ion cell will provide power for approximately 200 shots under "average" use and 100 shots with "extensive use of the LCD and flash".
Charge time for the battery using the supplied charger and in-camera charging is 5-7 hrs for a fully depleted battery. In the optional docking station, charging takes 2.5-3.5 hrs and using the optional rapid charger, charging takes 1-2 hrs. ... }

http://www.bobatkins.com/photography/digital/hp707.html

I would suggest taking all of them back to store for evaluation. They have a computer program that will be able to check the batterys for how many times charged and the condition. (most of them do) and also the chargers. Other than that we don't have a way to check the li ion with that program. If no satisfaction I would call manufacturer direct and speak with tech services for answers.

It sounds like the PSP does not recognize the charger. I recommend buying a Sony certified charger.

The battery isn't any good. The charger is just going through it's regular steps. (I know how it is. I just bought two Ryobi 18 volt batteries for my Ryobi cordless drill, reciprocating saw, flashlight,
trim circular saw, combo set. $60 for two batteries)

This should help address your question...http://blogs.popularwoodworking.com/editorsblog/PorterCable+Faces+Issue+Headon.aspx

WHAT KIND OF CABLE DO YOUUSE TO CHARGE A JAZZ HDV178 I WENT AND BOUGHT ONE BUT IT DON'T CHARGE THE BATTERY ?

I think your tryiong to charge NIMH batteries oon a charger designed for Lithium Ion batteries. With all the new style batteries such as NICAD, NIMH and LI-ION, charging becomes difficult. Most chargers pre NIMH and LI-ion, were designed for NICAD's. The best advise, match your batteries with the correct charger

Digital cameras are very Voltage Sensitive. Using Nicad or NiMh batteries will not only , "Not" solve the problems above but will
actually aggravate the above problems for one reason.

Rechargable NiCad or NiMh batteries only produce 1.2 volts fully charged and will only give you 2.4 volts when used in pairs with this camera. This falls below the cameras desired 2.8 - 3.0 voltage requirement and will only result in about 30-40 pictures at most.

This camera requires a constant 2.8 - 3.2 volts to run properly. Kodak won't tell you this !!The camera was designed with Oxy Akaline batteries in mind.New alkalines will produce 3.2 to 3.4 volts in pairs but only for a short period of time.The issue with the Oxy Alkaline batteries is that they simply will not last very long in this camera due to its power requirements.

But there is a really great solution to the problem . You can purchase a CRV3 rechargeable Li-ion battery that fits right into this camera.
You will get a realistic 180-250 photos per charge.The Li-Ion battery maintains a constant 3.0 volts for a very long period of time
and will allow the camera to function the way Kodak originally intended it to and can be recharged. You will find rechargable CRV3 battery kits on ebay or other online battery stores at a very reasonable cost.

You can also use a Lithium Non rechargeable CRV3 battery that will give approx 250-300 photos per battery but you may
find non rechargeable Lithium batteries cost prohibitive.

I use the rechargeable Li-ION Battery exclusively in this camera and it functions perfectly since I switched. I have a pair
of CRV3 Li-Ion batteries so I always have a fully charge CRV3 ready to go.

For reference I was only able to get about 30 pictures with the high capacity 2800 Mah Rechargeable NiMH Batteries I used prior
to using the LI-ION Battery. I get on average about 175 pictures per full charge from the LI-ION Battery.