Click here to close
New Message Alert
on sealed/unsealed...

on sealed/unsealed...  

  Click Here to have an E-mail Sent to you when a new message is added to this thread
Author: lead-acid...   Date: 4/18/2017 9:03:44 AM  +4/-0   Show Orig. Msg (this window) Or  In New Window

batteries -yes it does add to a longer service life. On nicad batteries not so much... if we are talking about a normal start cycle (one start per engine run).

It's all in the discharge rate profile. a lead acid starts at 100% and immediately discharges at a steady declining rate (99-98-97...). A nicad will discharge at constant rate for a short duration then decline (100-100-100-99-98...).

However, even in a perfect world that initial power surge (electric motors need 3x the current to start) begins to "set" the internal chemistry of a lead acid where the potential charge maybe less than 100% or the discharge rate is no longer proportional (100-92-90-89....). That is the reason for the required capacitance checks after a certain amount of time in service.

The reason it's not so prevalent with nicads is they require deep cycle every 2 to 3 months. But that doesn't mean you can't tweak a nicad with abuse. 

Now how does the apu/gpu help? It handles the initial high current demand of a start cycle which is the most detrimental demand on a battery. Not to mention repeated start attempts. I always recommend a start with an apu when possible, especially on the first start of the day.



Reply    Return-To-Index     Display Full Msg Thread   Rules of Engagement   Terms of Use

Does using a GPU really extend the +0/-3 life of a battery? 4/17/2017 5:20:00 PM