Hi Brandond1231, welcome to the forum.
I would say it depends. Most trustfire chargers have overcharge protection and will stop charging when the battery reaches the correct voltage.
Assuming your charger has this overcharge protection, I would say yes, it'll work and it shouldn't damage it. I would keep a close eye on it during charging though, and make sure to remove it as soon as it indicates it has reached full charge.
If you have a DMM (multimeter) then it would be a great idea to check the voltage as it comes off the charger. The damage to your battery will come from overcharging - so, so long as it's charging to 4.20 V, it should not affect the performance of your VTC4.
Some people do use the trustfire brand chargers successfully for months and months, but I would recommend you get yourself a good quality battery charger. They can be bought for as little as $10-13 for a decent one.