the
batteries have different charging characteristics.the circuitry in the batteries is different.
your charger should work though.
your basic charger is just a glorified trickle charger.as the battery voltage approaches the charging voltage
the charging current drops at a logarithmic rate not a linear rate.
example;lets say your battery needs charging.battery voltage =3.4 volts.charging voltage =4.2 volts.
for arguments sake lets say the initial charging current= 1 amp.when the battery reaches 3.8 volts the
charging current will be 1/4 amp,not 1/2 amp.at 4 volts it will be 1/8 amp,not 1/4 amp.
the charging current should stop when the voltages are equal.what happens is as the battery voltage approaches the charging voltage
the current draw is so low it takes forever to reach that final 1/10 volt difference.the battery should be 99.9 % charged after 3-4 hour.
may be a little more depending on the battery. a better charger would detect this and have the circuitry to adjust for this and switch
off once the battery reaches a set thresh hold voltage.for all intents and purposes 99.9% of a charge is just as good as 100% of
a charge you should be good to go after 3-4 hours give or take.a little experimenting will give you a more accurate time frame.
i suspect the vendor gave you a generic charger and not the one evod would sell you.an evod charger
would have circuitry that would match that in the battery and give the appearance of better performance.
i hope this helps.

regards
mike