For those not frightened of carrying an anchor on their bike these SLA batteries are really cheap. Just got the "Supercheap Auto" flier and they have those million candle power rechargeable lamps on sale for $9.99
For 10 bucks you get a 6v 4aH SLAB, a wall transformer, a crude battery charging circuit inside the lamp, a 55watt 6volt halogen lamp and a reflector. Jaycar currently have the same size batteries for $23. All that stuff for less than the cost of 2AA 2.5amp Ni-MH cells.
Battery fits nicely inside a M16 ammo pouch.
Simple job to open the lamp up, extract battery, poke around for a convient spot to drill a hole for the wires that were on the battery so that they will pass out through the case and attach to the battery for charging. Re assemble the lamp. Attach the charger to the lamp as normal. Of course the light itself is totally useless for bike use. After about 5 minutes the battery strains to keep the 55watt globe at full brightness. Good for "spotting" possums in the top of the palm trees.
For those not frightened of carrying an anchor on their bike these SLA batteries are really cheap.
Err, 4Ah is not a boat anchor. Try 18Ah (6kg).
OTOH, I shudder to think about the forty, free 40Ah i considered collecting.
Quoted message said:
Just got the "Supercheap Auto" flier and they have those million candle power rechargeable lamps on sale for $9.99
For 10 bucks you get a 6v 4aH SLAB, a wall transformer, a crude battery charging circuit inside the lamp, a 55watt 6volt halogen lamp and a reflector. Jaycar currently have the same size batteries for $23.
If the brands of the batteries are the same, then you can equate. Both probably yum-cha cheep chinese anyway.
For 10 bucks you get a 6v 4aH SLAB, a wall transformer, a crude battery charging circuit inside the lamp, a 55watt 6volt halogen lamp and a reflector. Jaycar currently have the same size batteries for $23. All that stuff for less than the cost of 2AA 2.5amp Ni-MH cells.
Wes components has 7Ah 12v SLAs for about $15 I think.
"HughMann" <[email hidden]> wrote in message news:[email hidden]...
Quoted message said:
For those not frightened of carrying an anchor on their bike these SLA batteries are really cheap. Just got the "Supercheap Auto" flier and they have those million candle power rechargeable lamps on sale for $9.99
For 10 bucks you get a 6v 4aH SLAB, a wall transformer, a crude battery charging circuit inside the lamp, a 55watt 6volt halogen lamp and a reflector. Jaycar currently have the same size batteries for $23. All that stuff for less than the cost of 2AA 2.5amp Ni-MH cells.
Battery fits nicely inside a M16 ammo pouch.
Simple job to open the lamp up, extract battery, poke around for a convient spot to drill a hole for the wires that were on the battery so that they will pass out through the case and attach to the battery for charging. Re assemble the lamp. Attach the charger to the lamp as normal. Of course the light itself is totally useless for bike use. After about 5 minutes the battery strains to keep the 55watt globe at full brightness. Good for "spotting" possums in the top of the palm trees.
Yes sure - no problem. They have small spade connectors. The correct size can be hard to source sometimes. A gentle squeeze with pliers will close the standard size connectors up so that they are tight.
For those not frightened of carrying an anchor on their bike these SLA batteries are really cheap. Just got the "Supercheap Auto" flier and they have those million candle power rechargeable lamps on sale for $9.99
For 10 bucks you get a 6v 4aH SLAB, a wall transformer, a crude battery charging circuit inside the lamp, a 55watt 6volt halogen lamp and a reflector. Jaycar currently have the same size batteries for $23. All that stuff for less than the cost of 2AA 2.5amp Ni-MH cells.
Go find yourself 2 or more 'dead' NiMH laptop battery packs. Usually only one or two cells in them are actually cactus and you can build up a 12V pack for nix with better power/weight than an lump of SLA.
Go find yourself 2 or more 'dead' NiMH laptop battery packs. Usually only one or two cells in them are actually cactus and you can build up a 12V pack for nix with better power/weight than an lump of SLA.
Is it difficult to test the individual cells, and what equipment is needed? Source for "undead" ones? Too many questions!
Go find yourself 2 or more 'dead' NiMH laptop battery packs. Usually only one or two cells in them are actually cactus and you can build up a 12V pack for nix with better power/weight than an lump of SLA.
Is it difficult to test the individual cells, and what equipment is needed? Source for "undead" ones? Too many questions!
give em a 1/10th charge for a while (few hours); then load test.
I find that applying a load like 1/10 (200mA on a 2Ah battery), then measuring each cell voltage, you'll find the good ones at near rated voltage (say 1.1V) and the dead ones either much lower, or reverse polarity.
As for a source.. find someone who uses a laptop 🙂
