Not the v.2 version but you can with the v.1 version;
https://malkoffdevices.com/products/...bodyguard-head
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“There is no growth in the comfort zone.”--Jocko Willink
"You can never have too many knives." --Joe Ambercrombie
Paul, the primary difference between BG v.1 and BG v.2 is that the v.1 is designed to run on a CR123 (3 volts), whereas the v.2 version is rated for 3.4 to 6.0 volts. The v.2 version gives more output on a Li-ion cell (either a 16340 or 18350) than the v.1 version. Maximum output of v.1 on a Li-ion cell is 700 lumens whereas the v.2 produces 1,000 lumens.
Bottom line: if you need to use CR123 batteries, roll with the v.1. If not, the v.2 is the better choice.
On another note, the Orbtronic 18350 1,200mAh cell has plenty of current capacity to carry the BGV2 head. I've seen differences in output using the 18350 vs. the typical 16340 cell which has a lower current capacity. These high-current heads need the juice to truly shine! ;-)
EDC Light Builder | No Nonsense Everyday Carry Flashlights | EDC Light Builder P-F Sub-forum
EDC Light Builder | No Nonsense Everyday Carry Flashlights | EDC Light Builder P-F Sub-forum
Not a direct in-hand comparison, but here is the basic specs on both;
Modlite 18350
- Max Continuous Discharging Current: 10A
- Typical Capacity: 1200 mAh
- Style: Button Top
- Approximate Dimensions (including button): 38.1mm length x 18.6 mm diameter
- Maximum Length: 38.1mm
- Discharge cut-off voltage: 2.5V (approximate)
- Voltage: 3.6V
- Full Charge Voltage: 4.2V
- Charge Current: 1.5A standard
- Protection* Cutoff Current: ~18A
*Modlite's statement on the use of protected vs. unprotected cells.
Orbtronic 18350
- Capacity: 1200mAh
- Type/Size: 18350
- Max. Discharge current: 15 Amp (5 Sec. ON /30 Sec. OFF)
- Max. Continuous Discharge current: 10 Amp (With cut off at 60° Celsius / temperature)
- Min. Capacity: 1100 mAh
- Typical Capacity: 1150 mAh
- Full charge: 4.2V (Max. 4.23V)
- Recommended charging current: 0.5A or 1A CC/CV (Battery can be charged at 0.25A, but charging time will take longer)
- Nominal voltage: 3.7V
- Low Cut-off Voltage: 2.5V (this is the lowest point any li-ion battery can be under load)
- Dimensions: 18.5 mm x 35 mm ( +/- 0.04 mm)
- Weight: 24 g (23.8 g - 24.1 g)
- Chemistry: Li-ion / Hybrid IMR
- Positive terminal: Flat Top
- Electronic External Protection: No (Unprotected)
Commentary
There are different Li-ion rechargeable cell types based on chemistry (details here).
IMR cells (M = Manganese) have lower internal resistance, which enables them to supply more current with less heat than a standard Lithium Cobalt Oxide(LiCoO2) cell. They use lithium manganese (LiMn), which makes them far more stable, and therefore more capable of providing safe, reliable, and consistent power to devices operating at high wattage and temperature levels. The primary disadvantage of IMR is lower storage capacity (lower mAh spec.).
"Hydrid IMR" is a newer class of batteries that combine the chemistry of IMR batteries with those of INR or NCR to bring up the capacity that is sometimes lacking in straight IMR models. This results in high-draining, high-capacity batteries that sustain adequate power levels and maintain consistent performance and overall reliability, while also being extremely safe compared to ICR batteries. The Orbtronic cell uses the latest hybrid IMR chemistry.
Protection circuits provide protection to the cell from over-discharge and over-charging. They also provide short-circuit protection, which is certainly of value to those who do not handle cells in a safe manner, such as dropping a cell in a pocket with keys, coins, etc. that could bridge the positive and negative terminals.
Protected or not, cells should always be stored and carried in a way that prevents the bridging of the positive and negative terminals and the creation of a fire hazard.
Protection circuits are thin PCB wafers on the negative end of an unprotected cell;
The addition of the circuit makes the cell longer and larger in outside diameter, which can sometimes create fitment issues. The circuits are also fragile and prone to failure due to impact damage, which is a consideration in critical-use applications. Perhaps the biggest drawback in a personal protection flashlight is the abrupt cut off of light when the voltage drops low enough (around 2.5 volts) to trip the protection circuit. At 2.5 volts, the EDCLB Dagger, Fat Boy and Bodyguard lights are still producing 40 to 50 lumens, which is certainly a very usable amount of light.
If you are in a critical situation, ruining a $7 cell may be a far better option than having the light suddenly die from a tripped protection circuit.
In normal use, the drop in light output will be very obvious as the voltage drops. When the output is visibly diminished, recharge the cell or swap in a fully charged one. I cover this on the Run Time & Battery Management page of the EDCLB website.
Fitment of Protected Cells in EDCLB Lights
Some may be more comfortable using a protected cell - use the following fitment guide;
- User-supplied cell outside diameter fit test: the cell should slide into the battery compartment with no resistance. Do not force the cell in!
- User-supplied cell length fit test: with the head off and the cell resting on an uncompressed tail cap spring, the positive terminal of the cell should not protrude past the front edge of the body.
- If the cell does not pass the fit tests above, select an 18350 cell with smaller dimensions.
In conclusion, the safe use of Li-ion cells is not difficult, and no different than the safe use and handling of any other potentially dangerous object.
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