I've been using a 12V, 7Ah sealed lead acid battery for my GPS equipment, but need something lighter.

The battery(s) will be charged daily.

Does anyone have suggestions for a battery or battery combinations that could achieve this?


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    \$\begingroup\$ The most advanced battery technology today is the LiPo. Look for it. \$\endgroup\$ – Eugene Sh. Jun 23 '16 at 17:59
  • \$\begingroup\$ Is the lipo more for high draw applications such as RC helicopters etc.? \$\endgroup\$ – Robin Jun 23 '16 at 18:00
  • \$\begingroup\$ The weight and reliability are most important. The batteries will be in a backpack and may get hot so will need to be stable. \$\endgroup\$ – Robin Jun 23 '16 at 18:02
  • \$\begingroup\$ Gps reciever and a radio. Max draw won't exceed 1.2A. \$\endgroup\$ – Robin Jun 23 '16 at 19:35
  • \$\begingroup\$ I'd avoid LiPos in hot backpacks as they have a nasty tendency to, well... explode in a ball of flames if provoked. LiFePO4 (or phosphate) cells would be the go, their energy density is a bit lower than Li-Ion and LiPo, but they have long life cycles and won't catch fire even if punctured, a lot of EVs use Lithium phosphate cells for this reason. More costly than lead acid but they'll weight much less. \$\endgroup\$ – Sam Jun 24 '16 at 0:49

It would depend on the power draw of your GPS equipment (are you using just a receiver or an entire computer system to analyze the data?) but lipo would be a good choice. A lipo can do high currents for long times without heating up, however it is not good with high heat environments.

You don't need a high C rate lipo, 20C at 5 or 10 amp hours will be plenty and much lighter.


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