removed
1 amp charge for a single 18650 is what I use.
The charging voltage is sort of critical for Li ion batteries. At the very least you would have to know how your pack is arranged and what voltage it is (4.2V or 8.4V .etc) and match that with the charger voltage. Can you measure the voltage of your battery pack?
Hey mate i have a Solarstorm X6 bike light it appears to be 2 batteries in series and 2 battery in parallel so it is 7 volts at around 3000mah and it charges at 1amp
The battery pack is 7.4V but the charger is 8.4V
yea that is right i guess because nominal voltage of a 18650 is 3.7volts each but fully charged cells are 4.2 volts each so technically it is 8.4 volts total. Mine is in the shed i will go and look now for you but i think its cold outside lol.
So your pack is 2 in series, 2 in parallel, like the light everydaysurvivalgear described above. Then that charger should work with your pack.
7.4V is the nominal voltage of the battery pack. 8.4V is the maximum charge voltage.
Yea, I did mean to put nominal voltage, thanks Ill look into buying a 1 Amp adaptor
So my one looks like this. I don’t know how much it can be trusted i am not sure if it even uses a charging algorithm like CC/CV or how accurate it is.
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If the charging circuit is part of the light would it even matter if you got a wall adapter putting out more current? My guess is that the charging circuit would limit the current to the batteries. But guesses are worth the same as uniformed opinions 
Pretty sure all of these lights use a generic connector. I think that although my AC Adaptor output is lower it’s probably higher quality. The solar storm lights tend to be a bit more risky. My light came from a well known supermarket. I’ll get a picture later, at the beach at the moment haha.
Ask yourself what’s the worst thing that can happen if you get this wrong.
You know when not to inhale, right?