One thing I should mention in case some novices happen to read this thread. Always charge a Lithium battery with the charger designed for it. Never ever try to jury-rig a charger to a Lithium battery (OK, you can, but you have to know what you are doing, and never leave it unattended).
Here's the reason. If overcharged, wet lead-acid batteries bubble and may spill acid. Sealed lead-acid, NiCad, and NiMH batteries may vent electrolyte through a safety vent. The above cause a mess and ruin the batteries, but are not lethal. Lithium batteries explode and catch on fire. They do not like to be overcharged at all, nor trickle-charged. When they are full, they are full. Absolutely no trickle charge.
"Old age is the most unexpected of all things that can happen to a man" -- Leo Tolstoy