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#1
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Help please - Bottle Cage Battery Supplier Required
I have a 12V halogen light.
Having changed my bike, the battery pack will not now fit - it hangs from a pack that will not fit on the frame. Does anybody know if there is there anywhere that supplies bottle-cage sized battery packs. So far I've only been able to find suppliers of the full light/battery kit. I don't need to change the lamp, so I'm trying to get just the bottle-cage sized battery. Any pointers appreciated. Cheers Mike |
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#2
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Help please - Bottle Cage Battery Supplier Required
"Mike_P" writes:
I have a 12V halogen light. Having changed my bike, the battery pack will not now fit - it hangs from a pack that will not fit on the frame. Does anybody know if there is there anywhere that supplies bottle-cage sized battery packs. So far I've only been able to find suppliers of the full light/battery kit. I don't need to change the lamp, so I'm trying to get just the bottle-cage sized battery. You'll need to find a source for whatever connector goes onto your lamp cable but I'd definitely recommend either http://www.modelpower.co.uk/ who deal in Nicad and MiMh packs and will make custom ones to your spec, or http://www.aurorra.co.uk/ who primarily sell lithium polymer cells and packs. A pack of 3 LiPo cells in series will give you around 12v and will be a lot smaller and lighter than Nicad or NiMh. I've used both companies and would definitely buy from them again. Chris -- Chris Eilbeck MARS Flight Crew http://www.mars.org.uk/ UKRA #1108 Level 2 UYB Tripoli UK Member #9527 LSMR |
#3
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Help please - Bottle Cage Battery Supplier Required
Wow - that was quick.
Thanks - I'll check them out. Cheers Mike |
#4
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Help please - Bottle Cage Battery Supplier Required
Mike_P wrote:
I have a 12V halogen light. Having changed my bike, the battery pack will not now fit - it hangs from a pack that will not fit on the frame. Does anybody know if there is there anywhere that supplies bottle-cage sized battery packs. So far I've only been able to find suppliers of the full light/battery kit. I don't need to change the lamp, so I'm trying to get just the bottle-cage sized battery. How about over-volting the lamp for greater brightness and efficiency? Lumicycle do high-quality 13.2V NiMH and 14.8V Li-Ion in both bottle and bag options (despite what the initial picures show): http://www.lumicycle.com/Product/Pro...x?page=1&dep=5 ~PB |
#5
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Help please - Bottle Cage Battery Supplier Required
Mike_P wrote:
I have a 12V halogen light. Having changed my bike, the battery pack will not now fit - it hangs from a pack that will not fit on the frame. Does anybody know if there is there anywhere that supplies bottle-cage sized battery packs. Make your own. See "http://www.myra-simon.com/bike/bott-batt.html" for the general idea. Use ten 1.2V AA cells (or 11 if you want to over-voltage, and if your charger will charge a 13.2V pack). If you have a 12V lead acid battery pack, then you may have to figure out something else. You might look at an oversize water bottle holder such as the MK3 from "http://www.bikebuddy.co.uk/index.html." You could probably figure out a way to use the clamps to go around the existing battery pack, with the use of some fillers. The 12V bottle batteries that I've seen from companies like Night-Sun are very expensive, i.e. $100 for a 30WH battery (see "http://www.night-sun.com/htmldocs/stuff_civilian.html"). Steve "http://bicyclelighting.com" |
#6
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Help please - Bottle Cage Battery Supplier Required
in message , Mike_P
') wrote: I have a 12V halogen light. Having changed my bike, the battery pack will not now fit - it hangs from a pack that will not fit on the frame. Does anybody know if there is there anywhere that supplies bottle-cage sized battery packs. So far I've only been able to find suppliers of the full light/battery kit. I don't need to change the lamp, so I'm trying to get just the bottle-cage sized battery. Is your present battery a lead-acid cell, or is it a pack of NiCad or NiMH cells? If the latter, take em out, get a bottle, pack them into the bottle, sorted. The Lumicycle battery pack is just an ordinary plastic water bottle with cells packed inside and the cable led out through where the drinking nipple has been cut off. Simple, but it works fine. There's a bit of packing material round the cells but that's really all there is to it. -- (Simon Brooke) http://www.jasmine.org.uk/~simon/ ;; It appears that /dev/null is a conforming XSL processor. |
#7
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Help please - Bottle Cage Battery Supplier Required
Thanks for the idea SMS.
11 AA batteries in a bottle, could work and should fit. Do you have any idea how to calculate what the run time would be. As NiMh's aren't cheap it would be an expensive experiment to find out the light only ran for 12 mins. Regards Mike "SMS" wrote in message ... Mike_P wrote: I have a 12V halogen light. Having changed my bike, the battery pack will not now fit - it hangs from a pack that will not fit on the frame. Does anybody know if there is there anywhere that supplies bottle-cage sized battery packs. Make your own. See "http://www.myra-simon.com/bike/bott-batt.html" for the general idea. Use ten 1.2V AA cells (or 11 if you want to over-voltage, and if your charger will charge a 13.2V pack). If you have a 12V lead acid battery pack, then you may have to figure out something else. You might look at an oversize water bottle holder such as the MK3 from "http://www.bikebuddy.co.uk/index.html." You could probably figure out a way to use the clamps to go around the existing battery pack, with the use of some fillers. The 12V bottle batteries that I've seen from companies like Night-Sun are very expensive, i.e. $100 for a 30WH battery (see "http://www.night-sun.com/htmldocs/stuff_civilian.html"). Steve "http://bicyclelighting.com" |
#8
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Help please - Bottle Cage Battery Supplier Required
Thanks for the link Pete. This is just the sort of thing I've been looking
for. Having looked at the Lumicycle site I'm very tempted to pay a bit more and replace the whole set with a nice new twin lamp spot/flood. Now look what you've gone and made me do. :-) Cheers Mike "Pete Biggs" p@melonbiggs{remove fruit}.tc wrote in message ... Mike_P wrote: I have a 12V halogen light. Having changed my bike, the battery pack will not now fit - it hangs from a pack that will not fit on the frame. Does anybody know if there is there anywhere that supplies bottle-cage sized battery packs. So far I've only been able to find suppliers of the full light/battery kit. I don't need to change the lamp, so I'm trying to get just the bottle-cage sized battery. How about over-volting the lamp for greater brightness and efficiency? Lumicycle do high-quality 13.2V NiMH and 14.8V Li-Ion in both bottle and bag options (despite what the initial picures show): http://www.lumicycle.com/Product/Pro...x?page=1&dep=5 ~PB |
#9
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Help please - Bottle Cage Battery Supplier Required
Mike_P wrote:
[Lumicycle] Thanks for the link Pete. This is just the sort of thing I've been looking for. Having looked at the Lumicycle site I'm very tempted to pay a bit more and replace the whole set with a nice new twin lamp spot/flood. Now look what you've gone and made me do. :-) Yes, the lamps are only about thirty quid afterall. Sorry, I'm not helping, am I? ;-) ~PB |
#10
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Help please - Bottle Cage Battery Supplier Required
Mike_P wrote:
Thanks for the idea SMS. 11 AA batteries in a bottle, could work and should fit. Do you have any idea how to calculate what the run time would be. As NiMh's aren't cheap it would be an expensive experiment to find out the light only ran for 12 mins. Capacity of a battery pack in watt-hours, divided by wattage of lamp, will give runtime in hours. AA NiMH cells are typically 2.1 Amp-hour though up to about 2.6 AH are available at higher cost. A pack made up of 13.2V worth of 2.1 AH cells will have a capacity of 2.1 * 13.2 = 27.7 Watt-hours. So you might expect a 10W lamp to run for 2.7 hours. Unfortunately it's not that easy - the cells are rarely as good as quoted (although the capacity can improve after the first few charging cycles) and in any case will be less than quoted if discharged fast. The 2100maH rating is probably correct for a 10-hour discharge not a 3-hour discharge. So derate by an arbitrary amount. Maybe that pack would operate a 10W lamp for 2 hours, a 20W lamp for less than an hour, and a 5W lamp for more than 4 hours. -adrian |
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