EvilLithiumMan
Enlightened
You can view the specs. at:
http://www.kaidomain.com/WEBUI/ProductDetail.aspx?TranID=3985
Size compared with standard (60mm) D cell:
Kai states for standard Mag spring to be cut down. I was able to install the
battery pack without trimming the spring, but it is a pretty tight fit.
I have two packs. The shrink sleeving on one is incomplete at the protection
PCB, the PCB itself feels very firmly attached:
Capacity testing was done with a 2D host, equipped with an AWR Hotdriver set to 6.9 volts. (I tried like heck to get 7.0 volts, but the pots on these devices are finicky. The coarse is too coarse, the fine too fine and after six beers I gave up).
I tested with three bulbs, each one twice. Capacity is easily calculated by multiplying the run time by the current. (Amps x Hours = Amp Hours). Packs were charged to 4.20 volts and the charging terminated when the current dropped to 500ma. (.1C)
Magcharger bulb, WA1110. (By the way, anyone ever notice that, rerated or not, WA1110 and WA1256 have identical specs.?) Battery pack ran for 2.75 hours at load of 1.75A, capacity = 4.8AH
WA1160 bulb. Drew 4.08 amps for 70 minutes (1.167 hours), capacity = 4.76AH
Phillips 5761 bulb. Drew 5.4 amps for 52 minutes (.867 hours), capacity = 4.68AH
Though not quite a full 5.0AH capacity, it is very good and an improvement over "version 1" of these cells, an unprotected cell which others have reported to have a capacity of 4.4AH.
Note: Many Li-Ion users prefer not to charge to 4.2 volts, so if charging to 4.10 or 4.15 volts, expect a little less run time.
I have misplaced my box of big *** Ohmite Brown Devil 100 and 300 watt resistors and am unable to verify if the pack/protection circuit supports 16 amp loads. The largest load I could manage to make was 8 amps, which worked fine.
And now the bad/disappointing results: I could not get either the high or low voltage protection circuits to function. I maxed the voltage to 8.60 volts (4.30 volts per cell) and the pack continued to charge. Above 4.30 volts, Li-Ion cells begin a dangerous process of deterioration. I stopped at this point. Kai claims 4.20 volts is the high trip point. It didn't happen for me. Low voltage trip is claimed to be 2.75 volts per cell (5.50 volts for the pack). I stopped discharging my packs at 4.6 volts (2.3 volts per cell). The packs quickly recovered to 6.0 volts when the load, a 2 ohm resistor, was removed.
http://www.kaidomain.com/WEBUI/ProductDetail.aspx?TranID=3985
Size compared with standard (60mm) D cell:
Kai states for standard Mag spring to be cut down. I was able to install the
battery pack without trimming the spring, but it is a pretty tight fit.
I have two packs. The shrink sleeving on one is incomplete at the protection
PCB, the PCB itself feels very firmly attached:
Capacity testing was done with a 2D host, equipped with an AWR Hotdriver set to 6.9 volts. (I tried like heck to get 7.0 volts, but the pots on these devices are finicky. The coarse is too coarse, the fine too fine and after six beers I gave up).
I tested with three bulbs, each one twice. Capacity is easily calculated by multiplying the run time by the current. (Amps x Hours = Amp Hours). Packs were charged to 4.20 volts and the charging terminated when the current dropped to 500ma. (.1C)
Magcharger bulb, WA1110. (By the way, anyone ever notice that, rerated or not, WA1110 and WA1256 have identical specs.?) Battery pack ran for 2.75 hours at load of 1.75A, capacity = 4.8AH
WA1160 bulb. Drew 4.08 amps for 70 minutes (1.167 hours), capacity = 4.76AH
Phillips 5761 bulb. Drew 5.4 amps for 52 minutes (.867 hours), capacity = 4.68AH
Though not quite a full 5.0AH capacity, it is very good and an improvement over "version 1" of these cells, an unprotected cell which others have reported to have a capacity of 4.4AH.
Note: Many Li-Ion users prefer not to charge to 4.2 volts, so if charging to 4.10 or 4.15 volts, expect a little less run time.
I have misplaced my box of big *** Ohmite Brown Devil 100 and 300 watt resistors and am unable to verify if the pack/protection circuit supports 16 amp loads. The largest load I could manage to make was 8 amps, which worked fine.
And now the bad/disappointing results: I could not get either the high or low voltage protection circuits to function. I maxed the voltage to 8.60 volts (4.30 volts per cell) and the pack continued to charge. Above 4.30 volts, Li-Ion cells begin a dangerous process of deterioration. I stopped at this point. Kai claims 4.20 volts is the high trip point. It didn't happen for me. Low voltage trip is claimed to be 2.75 volts per cell (5.50 volts for the pack). I stopped discharging my packs at 4.6 volts (2.3 volts per cell). The packs quickly recovered to 6.0 volts when the load, a 2 ohm resistor, was removed.
