Tigerlight lamp + Copia Li-ions?

[yclo]

Tigerlight lamp can be bought seperately, uses a 7.5v rechargable NiMh pack.

Copia Li-ions are 3.7v each, two of them in series will be 7.4v.

Hmm...

Are you pondering what I'm pondering?

 

[Deleted member 684]

I am wondering if the copia will take the current draw.. anyone measured what it's at?

 

[FalconFX]

I think it can handle 2.1Amps draw...

1400mahx1.5...

LemLux did a side-comparison between the Copias and some GP Li-Ions of similar size/chemistry, so if their current max holds true, then the Copias should be able to handle at least 1.5X current draw of their rated mah...

 

[lemlux]

The p91 is 2300 mA. The 1400 mAh Copia runs well without problematic voltage drop driving this bulb. Thus, it appears to run well at up to 1.64 C.

The smaller 1000 mAh Copia functioned but underdrove the P91 at 2.30 C. The internal Copia circuitry overvvoltage shut-off is apparently at some higher amperage threshold.

 

[Alan]

Using 2 of 168A (1.8A) could make a light with brightness of Tigerlight at the size of 8AX.

Alan

 

[brightnorm]

Originally posted by Alan:
Using 2 of 168A (1.8A) could make a light with brightness of Tigerlight at the size of 8AX.

Alan

<font size="2" face="Verdana, Arial">But for how long?

Brightnorm

 

[lemlux]

If the Tigerlight is using 4/5 A NiMH cells as speculated, the highest capacity I've seen is 2000 mAh.

This suggests that you'd get 9/10 the capacity of the Tigerlight pack with 2 @ LRB168A's.

 

[yclo]

Hmm, maybe Randy @ Tigerlight is listening?

 

[Alan]

In addition to smaller size, it requires less maintenance for casual users. NiMH requires periodical recharge regardless the light is being used or not. It has been quite a big hassle for me to maintain charges in my 10X, 9AN, UtraStinger, Stinger XT, Stinger HP, PolyStinger, SL20, X990 ... etc. not to mention AAs on LS lights.

Alan

 

[Alan]

Originally posted by brightnorm:
</font><blockquote><font size="1" face="Verdana, Arial">quote:</font><hr /><font size="2" face="Verdana, Arial">Originally posted by Alan:
Using 2 of 168A (1.8A) could make a light with brightness of Tigerlight at the size of 8AX.

Alan

<font size="2" face="Verdana, Arial">But for how long?

Brightnorm</font><hr /></blockquote><font size="2" face="Verdana, Arial">Whatever comes to battery capacity and lamp bulbs, I can't beat Lemux:-)

Alan

 

[lemlux]

Brightnorm:

Alan may not be inclined to challenge my observations about how effectively various bulb / battery system combinations work.

Alan's prudent caveats on the risk of heat damaging a reflector / lens / bezel system with some of the borderline (and not so borderline

) combinations Lemlux is willing to use for limited run times should be taken very seriously. (I guess I have less expensive access to lens and reflector replacements than Alan.

) (Alan tends to have many 20+ minute run times while I continue to suffer from ADD and have shorter concentration spans & run times

)

 

[Bushman]

Lemlux, Do you have a link to find the copia batteries?

What would be a suitable donor case for the tigerlight lamp to use these batteries?

Did you get my email regarding another matter?

 

[lemlux]

Bushman:

the Copia batteries can be ordered from Wargamers Club in Hong Kong.

For Charger:
http://www.wargameclub.com/cgi-bin/cart/shopper.cgi?cat=cat_category_Chargers%20And%20Dischargers

for batteries

http://www.wargameclub.com/cgi-bin/cart/shopper.cgi?cat=cat_category_Battery%20for%20Wolf-Eyes

The design of the Tigerlight double triangle NiMH pack is very efficient -- slightly wider than a D cell and only 86+ mm long.

At the moment, I'm more inclined to design a way to use either a Tigerlight LA or SL-35X LA in a cut-off and slotted SL-20X body carcass. (Intermittent charging and on-off switch failures became 90% of the time problems with one of the pair of 16-year old retired police SL-20X's I bought for $20.50 @.)

I would widen (to about 1") and lengthen (to not more than 6") the SL-20X switch assembly slot to hold a 7.2 V 3000 mAh Sub C NiMH R/C pack. Almost 80% of the width of this pack would slide sideways into the SL-20X body leaving about an 11 mm tall hump coming out of the slot. (the ID of the SL-20S is about 35 mm and the 7.2 V Sub C pack is 46 mm wide by 23 mm wide by 129 mm long) Just behind the back end of the battery I would epoxy the SL tailcap into the shortened end of the SL20X body. I would hope to reduce the distance from back of bezel to end of tailcap to no more than 7".

I'll wind up with a lighter shorty SL-20X that overdrives the 100 hour life SL-35X LA or perfectly drives or (slightly overdrives) the Tigerlight LA. I say "slightly overdrives" because I have to expect that the voltage drop is greater with Tigerlight's 4/5 A NiMHs than it is with 20 Amp load rated R/C Sub C NiMHs with at least 2/3 more capacity than the Tigerlight pack.

 

[Bushman]

Lemlux the tiger light has a voltage drop that can be easily measured at the charging "ports" I did that the other day but I cant remember the value I will try again on monday and post the results.

 

[TigerLight Pro]

I am listening E mail me the specs of the best Li bats that are available I am always collecting data

 

[James Van Artsdalen]

Originally posted by Alan:
NiMH requires periodical recharge regardless the light is being used or not.

<font size="2" face="Verdana, Arial">Most Li-Ion batteries I've used self-discharge in a month or so. Do Copia stay fresh longer?

 

[FalconFX]

Self discharge in a month? Completely?

That's way too abnormal. May be dud batteries or something, because even NiCads, notorious for discharging, won't go bad in only a month from a full charge...

 

[lemlux]

Alan's comments probably hint at the cause of James' observations. My Cell phone and PDA Li-Ions will deplete in less than a month. My spare Camera Li-Ions will maintain almost full charge for many months.

 

[lemlux]

When will a light maker design a light where you drop in a widely available 3 cell long by 2 cell wide 7.2 V sub C R/C pack in the back body and plug the Tamaya connector into the head unit? The handle portion would be 43 mm longer than the 2 long by 2 wide SF 10X Dominator plus a few additional mm to allow for the Tamaya connectors.

The package would be small enough, comfortable to hold and offer more volts, amps, and wattage delivery capability (with aluminum reflector, heat resistant high-transmissivity lens, and 5 Amp current handling electrical paths and switch) than existing lights offered by Tigerlight, Streamlight (except for SL35-X), Surefire, and Maglight.

The light could be sold with or without chargers and batteries as people would have a broad price and performance range of existing options from which to choose.

 

[Alan]

Li-ion battery is known for its low self-discharge rate in additions to its higher capacity. Even NiMH won't be self-discharge in a month. What type of your *most* Li-ion batteries are, for cell phone, PDA, laptop, camcorder or flashlight?

Most devices that use Li-ion battery will drain the battery even the device is off. Do you keep your battery separated from the device? Did you charge your battery daily like cell-phone? Bear in mind that all rechargeable has life span for around 500 recharge cycles only.

Nonetheless, self-discharged in a month is definitely strange for whatever rechargeables.

Alan