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lithium batteries

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Post  zacc Fri 08 Jan 2010, 16:08

hi all
do lithium batteries, say 7.3volt hold there voltage and then stop, or does the voltage slowly drop off like ordinary rechargable ? this is when they are in use by the way.

zacc
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lithium batteries Empty Re: lithium batteries

Post  GoldstalkerGPX Fri 08 Jan 2010, 16:15

Zacc, I do believe they drop off slowly to a point (not sure what voltage) before they shutdown.
Cheers
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Post  kiwi Fri 08 Jan 2010, 19:04

hi zacc,i have set our detectors up with a lithium polymer bat 5a/h fully charged 8.1 v very high power density only 20 mm thick about 120mm long by 45 wide,velcos nicely on the side of the detector,voltage drops of slowly as it discharges like any other batt,the internal v reg in the detector maintains a constant voltage till the batt drops to a certain value[around 7v, i think] then you will get a low voltage signal from the detector,cheers kiwi.
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Post  zacc Fri 08 Jan 2010, 21:29

i will be trying them on an sd2100,dont know if that detector has any sort of voltage regulator

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Post  Chookfoot Thu 04 Mar 2010, 10:33

kiwi wrote:hi zacc,i have set our detectors up with a lithium polymer bat 5a/h fully charged 8.1 v very high power density only 20 mm thick about 120mm long by 45 wide,velcos nicely on the side of the detector,voltage drops of slowly as it discharges like any other batt,the internal v reg in the detector maintains a constant voltage till the batt drops to a certain value[around 7v, i think] then you will get a low voltage signal from the detector,cheers kiwi.

Kiwi,
What detectors are you running this on ? I use an extreme and need a spare battery.
Been thinking of regulating a 3 cell lipo but parts will cost a lot more.
What sort of time do you get from the 5000mah pack ?
Also into RC planes so I have lipo chargers etc.
Thanks
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