With battery problems being so common I think a dedicated thread is in order. If you have a battery problem please post your problem here so we can compile a database of common problems and try to help you. Also if you want to add some suggestions to try, I will add them up here. Please note NiMH batteries (the green ones Pleo uses) are generaly stored and shipped partially charged. If the battery is left dead and not charged for many months, it can cause the battery to loose the ability to charge. This is typical of any rechargeable battery and is what causes many of the problems, however with a bit of perseverance you may be able to 'rescue' your battery.The first step is to seat the battery correctly. Push one end in first until it clicks into place then gently but firmly push the other end down until you hear a second click, the battery should be sitting straight and be firmly in place. Remember if in doubt, or if you are getting frustrated, take a break, unseat the battery, unplug the charger and just start again.My battery only charges for ten minutes before the light goes red and I have to take it of the charger and reseat it (and repeat the process over and over).Keep on reseating your battery until it fully charges, even if you do have to sit there and babysit it, eventually as you continue to use the battery it will begin to charge longer and longer without you having to reseat it. Eventually you will recondition the battery to behave just like it should, but be patient it may take quite a few cycles to get it back to normal.
Another reason for the 'ten minutes to green but no or little playtime' can be that one of the six cells in the battery has gone dead and sadly no amount of reconditioning can repair a completely dead battery

However the only way to know for sure is to try the above steps and if you don't gain any improvement within a week or so (assuming you try charging at least once daily) then sadly this may be the case. There is a home made solution in the 'how to refurbish a battery pack' posting. However a little technical know-how is essential. Bear in mind that the pack is no use anyway, so you can't make it any worse!
My battery only charged for 1-1 1/2 hours on it's first charge.Not to worry, this is often completely normal, some batteries appear to come partially charged especially batteries purchased separately. First of all though make sure the battery simply hasn't overheated, touch the battery, if it is hot then remove it from charge and allow it to cool before reseating it in the charger. If the battery is cool to touch then just double check, remove the battery and reseat it, if it turns red very quickly then it is done, if it continues charging then just leave it be and check on it later

Also please note that in some countries which have different power ratings charge times may be less than 4 hours. In Australia my batteries charge in 2 1/2- 3 1/2 hours depending on the temperature (in summer they have to stop and cool down halfway through a charge).
My Pleo goes to sleep after a short time or is not waking up at all.Sadly some batteries are unable to be saved and come already dead, but try the steps listed above just to double check and see if you can't redeem your battery. If you can borrow a battery of a friend or try another battery just to be certain that it isn't a Pleo problem (although it is very very unlikely).
I have one of the new Innvo chargers coming in the mail sometime in the next few weeks. Would I be better served to continue trying to nurse the battery back to health using the regular charge, or might the reconditioning charge help it? (or conversely, might it hurt it?)The reconditioning function can't hurt it, so definitely give it a go. Hopefully it will speed things up for you so you don't have to spend two weeks baby sitting a battery like I had too
Reports for the new charger with the 16 hour cycle have so far been positive
It has improved some batteries.