SeizeTech

I'm sceptical that it delivers enough current for use or to significantly charge your battery.

Here's the formula if you want to check it out:

I = P/V ( rated current = Watts / Volts )

for example: a 5Watt, 12 Volt solar panel is 5/12 = .4 Amp

if your 2 amp charger takes 6 hours, your .4 amp solar panel would take you about 26 hours to charge. If you put them together, the extra .4 amps would shorten the charge time by 1.5 hours.

But I dont think you can use it on a lithium ion battery, quick charging a lithium ion only extends the amount of time needed to balance the battery pack at the end of the charge cycle. this results in a similar charge time.