Thanks @got lumens.
i would really appreciate letting Jason know there is a interest on the shorty bodies. Been wanting one for a while.
Thanks. He is aware
. I'll grab one too if they come back.
Alpha Shorty Tube IMR Type Cell(Battery) Requirements:
The ICARUS driver drawing a maximum of ~3.4A off of an IMR 18350 800mAh capacity cell equals out to about 4.25C of current the cell needs to deliver to be safe to use. Most regular secondary Li-Lion chemistry(ICR/NCA/NCR
) types of cells can only deliver ~2C of current safely. An IMR type cell is required to power the Alpha Shorty Tube. IMR type cells require special operation and care to overcome the lack of a protection board that regular protected cells have that help prevent an unsafe condition of an over charged, over dis-charged, or a directly shorted cell state.
According to several tests using the Aspire 1100 18350 shows to be more than adequate for use in any Alpha (Icarus or original driver) using a short body tube. I have one in mine now and it seems to work great. If I didn't trust in the testing I've read I wouldn't recommend this but a couple of the tests are from extremely reputable sources.
18350 IMR cells are a specialty item only marketed to enthusiasts. It is recommended to invest the needed time researching a compatible IMR type cells to use safely with an Alpha Shorty Tube. Do not use unknown, unmarked, bulk, un-branded, Experimental, or economy branded cells in a Shorty Tube.
) Lithium ion nickel manganese cobalt oxide's technologies are not standardized formulas, or recipes. They can vary greatly between different manufacturers that adopt different levels and metal content combinations that changes the chemistry balances and it's capabilities within each of the different cells. This is an evolving technology that changes when manufacturers discover an advancement that changes the characteristics and chemical combinations within the cell. Until otherwise changed, INR type cells can not be recommended to use in an Alpha Shorty Tube due to older manufactured versions of INR type cells danger that will occur if accidentally used in an Alpha Shorty Tube by mistake.
Jd's research above and Aspire 18350 1100 INR cell show it's capabilities of a constant discharge rate of 10A. Please exercise extreme caution, Aspire 1100 charge current is only rated at ~0.5-1C, far less than most high discharge capable cells. The manufacturers cell type description is INR, however the cell's specification tests appear to mirror that of an IMR type technology. This could be Aspire has created a new INR/IMR, or Hybird blend, that deserves a needed new type description of it's Li-Lion chemistry creating a new class of known types. Or it could by a simple translation error from the manufacturer.
Thank You Jd for your research. My thoughts are it's a new evolving hybird cell chemistry mix that should be reclassified. They just advanced the cell to the Aspire 1300. Advancing cell designs will continue. It is unclear if this will or when drive the addition of a new cell type for the Alpha Shorty Tube.
It is best to stick with quality IMR chemistry type cells as recommended.
The Aspire 1100 cell may have what it takes, but it's listed Lithium technology type has not been approved for use at this time.
Below is some historical information about Li-Lion cell type categorization, and a description of INR type and why they have not been a safe/compatible cell technology to use with any Alpha flashlight.
repost from batterybro:
This table shows current 18650 battery chemistries and their abbreviations:
The above Table is not viewable on all platforms. Click Here
|Long-form name||Chemical abbreviation||Name format 1||Name format 2||Name format 3|
|Lithium manganese oxide||LiMn2O4||IMR||LMO||Li-manganese|
|Lithium manganese nickel||LiNiMnCoO2||INR||NMC||---|
|Lithium nickel cobalt aluminum oxide||LiNiCoAlO2|| ---||NCA||Li-aluminum|
|Lithium nickel cobalt oxide||LiNiCoO2||---||NCO|| ---|
|Lithium cobalt oxide||LiCoO2||ICR||LCO||Li-cobalt|
|Lithium iron phosphate||LiFePO4||IFR||LFP||Li-phosphate|
Here is information found on batteryuniversity 's website about INR/NMC cells charateristics
Lithium Nickel Manganese Cobalt Oxide: LiNiMnCoO2. cathode, graphite anode
Short form: NMC (NCM, CMN, CNM, MNC, MCN similar with different metal combinations) Since 2008
Voltages 3.60V, 3.70V nominal; typical operating range 3.0–4.2V/cell, or higher
Specific energy (capacity) 150–220Wh/kg
Charge (C-rate) 0.7–1C, charges to 4.20V, some go to 4.30V; 3h charge typical. Charge current above 1C shortens battery life.
Discharge (C-rate) 1C; 2C possible on some cells; 2.50V cut-off
Cycle life 1000–2000 (related to depth of discharge, temperature)
Thermal runaway 210°C (410°F) typical. High charge promotes thermal runaway
Applications E-bikes, medical devices, EVs, industrial
Comments Provides high capacity and high power. Serves as Hybrid Cell. Favorite chemistry for many uses; market share is increasing.