The SMOKTech eGo-style battery comes in multiple colors and sizes, including 350 and 450 mAh designs, which most manufacturers don’t carry in their SMOKTech eGo line of batteries.
The SMOK eGo is also available with two different charge-port options. All SMOK eGo batteries can be charged using the standard eGo style thread on charger, but the option to upgrade to a pass-through style charge port can be chosen. A pass-through battery has a micro or mini USB port on the bottom of the battery which allows the user to charge the device while vaping.
This option can also be desirable because in the event of a broken or lost charger a new one can be obtained from any local electronics store, department, or gas station, whereas eGo style chargers are unique to e-Cig batteries.