So i've had my lava tube for about 3 weeks now and I am using the "fake" aw battery that it came with. From what i've read these batteries go up to 4.2 from a full charge. Every time i charge my battery i carefully watch it, when the trust fire charger turns green i immediately take out the battery and put it in my lava tube. When i check the volts of the battery it goes up to 4.1 only. This has happened many times. Should i just leave the battery in the charger for a little longer?