Battery charger for gap tool updates
Thread Starter
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Recovery Vehicle
Joined: Jul 2007
Posts: 1,227
Likes: 48
From: La Jolla, California
Battery charger for gap tool updates
Gap Diagnostics recommends that the vehicle be on a battery charger while doing updates. Battery discharge during an update can render a vehicle doa. A battery tender or small home charger are not recommended. What are you using to charge maintain your battery while using the gap tool? I have drained my battery a few times while searching for and clearing codes. The local Land Rover dealer uses a portable power supply. I don’t want to spend a fortune but I would like to find something that will give me confidence that I am not going to kill my battery every time I hook up my gap tool. Thanks. Phil
Baja
Joined: Aug 2013
Posts: 6,891
Likes: 787
From: Huntington Beach CA
Anything quality will cost you. You are looking for one that has a "flash program" setting. Keeps your voltage at a constant 14.2 volts.
https://www.aeswave.com/100A-Flash-P...ger-p9650.html
https://www.aeswave.com/100A-Flash-P...ger-p9650.html
Rock Crawling
Joined: Aug 2008
Posts: 343
Likes: 34
I don't have a GAP tool as I own Faultmate 2 Extreme but for updates I have purchased a CTEK 25000 few years a go as it has a supply mode with constant 14.4 V. Some updates take surprisingly long time to complete. I don't use it often, mainly for battery recharge nowadays, but our LR3 is sure thirsty , when it comes to power need. Just when you open the door current draw is almost 25 Amps and this is basically what you will need doing updates. Current draw for diagnostics is usually 25 Amps as well.
Thread Starter
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Recovery Vehicle
Joined: Jul 2007
Posts: 1,227
Likes: 48
From: La Jolla, California
Holy Smoke! $700, I am better to make friends with a local shop, drop some donuts and a $20 every time that I do an update. The trickle chargers just don't have enough power to keep the "lights on." Phil
Rock Crawling
Joined: Aug 2008
Posts: 343
Likes: 34
CTEK 25000 can be currently own for only 200 bucks off A*****n jungle. it was not the case back then when I bought it. In any case you will need a steady load of 25 Amps for updates and diagnostics in which simple trickle chargers just can't deliver.
Three Wheeling
Joined: Aug 2018
Posts: 97
Likes: 19
From: Portland, OR
I've had good results using a cheap 12V regulated power supply designed for CB radios. I've mostly only used it on my E46 BMW but the concept is the same, a decent amperage power supply that won't shift voltages on you. Similar to this: https://ebay.us/45WSPk Get a cheap set of jumper cables and cut off one end to wire to the power supply to make the hookup easy.
