Lead to lithium battery anything change?

Just got the deal on the Marcum 10 amp battery aside from making sure to charge it with its own charger is there anything I need to do different to my locators one is a Helix 5 the other vexilar fl20. Or just plug and play?

Plug and play. Got the same deal, picked it up last night. I would suggest running a 5amp inline fuse between the battery and your electronics (ran my helix 5 si without a fuse for a couple years without a fuse and it was fine).

Also, at the bottom of this page there is a chart showing the estimated run time for your unit based on the power draw for all sorts of electronics. These should be pretty accurate due to the flat discharge curve of the lithium battery. Your screen brightness will probably be the biggest power draw on the battery.

https://marcumtech.com/product/brute/#1591624590041-659f163f-62d3

mrpike just be aware that battery power indicator on the Helix 5 will not show an accurate value for the lithium battery.

Thanks for the heads up all will it read any power?

Be sure the battery is over 32 degrees when you charge it. Otherwise it will be ruined. This is due to chemical makeup of LiPO4 batteries.

mrpike1973 wrote:

Thanks for the heads up all will it read any power?

Yes it will but is nowhere near accurate.

The link that Luttes posted will give a general guideline as to how long it will last for all kinds of depth finders.

Thanks guys that helps a lot!

luckydave wrote:

Be sure the battery is over 32 degrees when you charge it. Otherwise it will be ruined. This is due to chemical makeup of LiPO4 batteries.

This is key,those batteries probably have a basic BMS with no temp monitoring.Even the life of discharged SLA batteries will be shortened by trying to charge them frozen.
One of those thermal soft-pack bags with a hand warmer would work well.