0
\$\begingroup\$

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?

\$\endgroup\$

closed as off-topic by uint128_t, dim, placeholder, Nick Alexeev Jun 23 '16 at 19:43

This question appears to be off-topic. The users who voted to close gave this specific reason:

If this question can be reworded to fit the rules in the help center, please edit the question.

  • 1
    \$\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
1
\$\begingroup\$

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.

\$\endgroup\$

Not the answer you're looking for? Browse other questions tagged or ask your own question.