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A high powered flashlight is only as good as the batteries that drive it!

When you buy Genuine Voidhawk™ Brand Batteries you can be sure you're going to get brand new factory fresh high performance power cells labeled with a TRUE mAh rating delivering you over 800 recharge cycles per cell.

VoidHawk™ batteries are made with the highest quality power cells and are designed to provide stable high drain amperage output all the way to the end of the discharge cycle. Sure you can buy cheaper batteries for your light but you won't get the true power and long run times the light was designed for out of low quality batteries.

Don't take a chance on possibly dangerous low quality lithium-ion batteries. If the price seems too good to be true, it probably is. If you're shopping for safe high quality Li-Ion batteries you can buy VoidHawk™ brand batteries with confidence.

The market for high power 18650 lithium ion batteries is flooded with reclaimed batteries from old laptop battery packs being sold as new with extremely high and misleading mAh ratings. These cheaper reclaimed batteries are at the end of their recharge / discharge cycle lifetimes and will not last for the 800 cycles a true brand new 18650 li-ion battery should.

MAh ratings are a measure of the storage capacity of a battery down to a certain voltage. 18650 li-ion rechargeable batteries have an operating range of ~2.7v - 4.2 volts max. You should never discharge a rechargeable 18650 li-ion battery lower than 2.5v. When you see rechargeable 18650 batteries with extremely high mAh ratings (over 3800) it's usually because they are rated down to 1 volt or less. The TRUE way to measure the mAh rating on a 3.7v 18650 rechargeable battery is to the end of its safe operating voltage which is ~2.7 volts.

* Please Note: Currently it is impossible to make a rechargeable 18650 3.7v li-ion battery over 3800 mAh capacity.

Any 18650 Li-Ion Rechargeable Battery advertised over 3800 mAh Capacity is not using the proper rating system on their batteries. We have found in our market testing that even batteries claiming to have a mAh rating within what is actually possible in reality are rating them 2 or 3 times what their actual capacity is if measured within their designated operating range.

Unprotected li-ion batteries can be run down to literaly zero volts but doing so will internaly short out the battery and you will never get it to recharge again or worse it could catch fire the next time you try to charge it. All Voidhawk™ brand batteries contain a special protection circuit board wired onto the negative end of the battery to prevent it from draining below ~2.7 volts or charging above 4.2 volts.

Many batteries being sold on the open market claim to be "protected" batteries but do not contain the necessary protection circuit board on the negative terminal to actually be "digitaly protected". The only protection an 18650 li-ion battery has without the extra protection circuit board attached to it is a built in pressure release electrolyte venting system designed to prevent the battery from exploding if overcharged. It will however vent electrolyte violently! This is why it's important to be sure your batteries contain a built in protection circuit board on the negative terminal.

All Voidhawk™ Brand Batteries contain automatic over and under charge cut off circuitry, plus short circuit protection fusing built in for worry free operation.

You can never short-circuit, over-charge, or over-discharge a genuine Voidhawk™ Brand 3.7v 18650 Lithium-Ion Battery.

VoidHawk™ 3.7v 3400mAh Protected 18650 Lithium-Ion Battery Technical Datasheet:
Nominal Capacity: 3400mAh (0.2C, 2.75V discharge)
Recharge Cycles: 800 (85% storage capacity at 500 cycles)
Charging Voltage: 4.2 ±0.05 V
Nominal Voltage: 3.7V
Charging Method: CC-CV (constant voltage with limited current)
Charging Current: 1625mA
Charging Time 4 hours
Max. Charge Current: 1625mA(ambient temperature 25°C)
Max. Discharge Current: 5200mA(ambient temperature 25°C)
Discharge Cut-off Voltage: 2.75V
Cell Weight: 47.5g
Volumetric Energy Density: 676 Wh/l
Gravimetric Energy Density: 243 Wh/kg
Cell Dimension: Height: 65.00mm Diameter: 18.40mm
Operating Temperature: Charge: 0 to 45°C Discharge: -20 to 60°C
PCB Overcharge detection voltage(VCU): 4.325±0.05V
PCB Overcharge detection delay time: 1.2±0.5 S
PCB Overcharge release voltage: 4.05±0.05V
PCB Under-discharge detection voltage(VDD): 2.50±0.10V
PCB Under-discharge detection delay time: 144mS
PCB Under-discharge release voltage: 3.0±0.1V
PCB Excess current threshold (IEC): 7 A
PCB Maximum Pulse Current: 5.2 A
PCB Maximum Continuous Current: 3.5A
Short Circuit Detection delay time: Max .320uS