The Loongtotem EVO VV mode, has 3 voltage options ( 4 if you add its eGo Mode with a 16650 battery), works like a charge, looks great. More a multi voltage then a true variable voltage. Basicly something in between a eGo VV and a lavatube or provari. It uses pulse width modulation to regulate the voltage.

Version number 3, comes with a improved circuit board , battery caps that can fit aw imr batteries and 2 vent holes at the bottom

version 2.5 comes with the improved circuit board, batteru caps without the 2 vent holes at the bottom

This is only for just the MOD

Press Button 3 times within 2 seconds
Green Color 3.7
Orange Color 4.7V
Red Color 5.7V

MOD ONLY

Comes with:

• 1 pc Variable Voltage Control Parts
• 1 pc Battery Cover
• 1 pc Cartridge Cover ( fit both top and bottom)

BATTERY SAFETY:

Simple Guidelines for Using Batteries

• Keep the battery contacts clean. A 2-cell configuration has 4 contacts (ground to cell to cell to positive connection); each contact adds resistance.
• Never mix batteries; replace all cells when weak. The overall performance is only as good as the weakest link in the chain.
• Observe polarity for proper placement. A reversed cell subtracts rather than adds to the cell voltage.
• Remove batteries from the equipment when no longer in use to prevent leakage and corrosion. While spent alkaline normally do not leak, spent carbon-zinc discharge corrosive acid that can destroy the device.
• Don’t store loose cells in a metal box. Place individual cells in small plastic bags to prevent any electrical short. Don’t carry loose cells in your pockets.
• Keep batteries away from small children! If swallowed, the current flow of the battery can ulcerate the stomach wall. The battery can also rupture and cause poisoning. Go to a Hospital immediately or call POISON CONTROL. 
• Do not recharge non-rechargeable batteries; hydrogen buildup can lead to an explosion.
• Observe polarity when charging a secondary cell. Reversed polarity can cause an electrical short that can lead to heat and fire if left unattended.
• Remove fully discharged batteries from the charger. A consumer charger may not apply the optimal trickle charge and the cell could be stressed with overcharge.

 (Battery info from: http://batteryuniversity.com/learn/article/serial_and_parallel_battery_configurations)

Realistically the chances of a battery going explosive or catching serious fire are very limited. The bottom of the EVO/SVR battery sleeve has been press fit. In the event of a battery failure the bottom cap will pop off. This has been tested and true by the manufacturer Loongtotem.

Important Notice: This item is been sold at Clearance and is no longer covered by any of our warranties.