# Gem e6 battery pack **URL:** \ **Category:** GEM Forum\ **Created:** [July 30, 2021, 8:23pm UTC](https://community.electricforum.com/t/gem-e6-battery-pack/22029 "2021-07-30T20:23:36Z")\ **Posts on this page:** 16\ **Page:** 1
**Author:** ![GD\_Debre](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/gd_debre/32/15420_2.png) [@GD\_Debre](https://community.electricforum.com/u/GD_Debre)\ **Post date:** [July 30, 2021, 8:23pm UTC](https://community.electricforum.com/t/gem-e6-battery-pack/22029/1 "2021-07-30T20:23:36Z")
Have a gem e6 with new batteries 9 8 volts that slow down on a half battery charge what should I do this are some pictures of my issues ![image](https://canada1.discourse-cdn.com/flex030/uploads/electricforum/original/2X/d/dc5426ab271444f5aac8e5a0b0ec95c5f2f09316.jpeg) ![image](https://canada1.discourse-cdn.com/flex030/uploads/electricforum/original/2X/9/9e474b1f83e6169043c67d5169642a2e6d4a1f93.jpeg) ---
**Author:** ![Inwo](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/inwo/32/1067_2.png) [@Inwo](https://community.electricforum.com/u/Inwo)\ **Post date:** [July 30, 2021, 9:07pm UTC](https://community.electricforum.com/t/gem-e6-battery-pack/22029/2 "2021-07-30T21:07:01Z")
About all you can do is charge the batteries. Either the batteries or cabling, can’t hold the voltage above the minimum required for high speed. I guess you could reprogram for full speed, but it would only kill your batteries faster. If batteries are new, maybe it will improve after a few cycles. IMHO, I’m no expert on lead batteries, nor do I recommend them. ---
**Author:** ![grantwest](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/grantwest/32/15_2.png) [@grantwest](https://community.electricforum.com/u/grantwest)\ **Post date:** [July 30, 2021, 9:25pm UTC](https://community.electricforum.com/t/gem-e6-battery-pack/22029/3 "2021-07-30T21:25:32Z")
Some More info: His controller is a New T4 that he got from Mike Mc from FSIP. He also said that One of his 9” 8v battery’s has a compromised positive terminal. (I guess one of his battery connections was loose and it burnt the pos terminal and now he is using a secondary connection to that compromised battery. My thought was that the battery that got hot is possibly compromised ---
**Author:** ![JarJarJava](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/jarjarjava/32/15158_2.png) [@JarJarJava](https://community.electricforum.com/u/JarJarJava)\ **Post date:** [July 30, 2021, 9:41pm UTC](https://community.electricforum.com/t/gem-e6-battery-pack/22029/4 "2021-07-30T21:41:29Z")
That is a distinct possibility, Dave. Melting a post is never a good thing for a lead battery. Also, 9 batteries in series via flexible copper cables and counting on a bunch of 3/8" nuts to create good contacts by pressure alone is a lot of places to pick up extra resistance. ---
**Author:** ![grantwest](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/grantwest/32/15_2.png) [@grantwest](https://community.electricforum.com/u/grantwest)\ **Post date:** [July 30, 2021, 10:09pm UTC](https://community.electricforum.com/t/gem-e6-battery-pack/22029/5 "2021-07-30T22:09:11Z")
My first guess was to “load tes the battery that has a comprised post. Any good automotive shop will do a battery test for free ---
**Author:** ![AssyRequired](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/assyrequired/32/7621_2.png) [@AssyRequired](https://community.electricforum.com/u/AssyRequired)\ **Post date:** [July 30, 2021, 10:13pm UTC](https://community.electricforum.com/t/gem-e6-battery-pack/22029/6 "2021-07-30T22:13:20Z")
> My first guess was to “load tes the battery that has a comprised post. I was thinking he could just put a meter across it and take it for a drive. If the damaged cell is in the middle of the pack he can put the meter lead on the next post in line(so it measures the quality of the compromised connection). ---
**Author:** ![grantwest](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/grantwest/32/15_2.png) [@grantwest](https://community.electricforum.com/u/grantwest)\ **Post date:** [July 30, 2021, 11:13pm UTC](https://community.electricforum.com/t/gem-e6-battery-pack/22029/7 "2021-07-30T23:13:36Z")
If you had to guess what do you think Voltage drop would be on a FLA battery when he puts a load on it. Example the battery is fully charged 8v and you take off a healthy battery would drop down to what? 7v 6v? Just wondering ---
**Author:** ![JarJarJava](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/jarjarjava/32/15158_2.png) [@JarJarJava](https://community.electricforum.com/u/JarJarJava)\ **Post date:** [July 30, 2021, 11:13pm UTC](https://community.electricforum.com/t/gem-e6-battery-pack/22029/8 "2021-07-30T23:13:47Z")
Need a baseline on a good one first. What if the whole pack is clapped out. ---
**Author:** ![grantwest](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/grantwest/32/15_2.png) [@grantwest](https://community.electricforum.com/u/grantwest)\ **Post date:** [July 31, 2021, 12:26am UTC](https://community.electricforum.com/t/gem-e6-battery-pack/22029/9 "2021-07-31T00:26:34Z")
I agree. I had a battey go out on what I thought was a perfectly good pack. 1 of the battery’s just cracked and gassed. The entire pack dropped below spec and the car went into turtle mode ---
**Author:** ![Old\_Houseboater](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/old_houseboater/32/544_2.png) [@Old\_Houseboater](https://community.electricforum.com/u/Old_Houseboater)\ **Post date:** [July 31, 2021, 12:33am UTC](https://community.electricforum.com/t/gem-e6-battery-pack/22029/10 "2021-07-31T00:33:11Z")
Do a brake load test. If you have a dud it will show up in a hurry. ---
**Author:** ![LithiumGods](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/lithiumgods/32/672_2.png) [@LithiumGods](https://community.electricforum.com/u/LithiumGods)\ **Post date:** [July 31, 2021, 2:37am UTC](https://community.electricforum.com/t/gem-e6-battery-pack/22029/11 "2021-07-31T02:37:41Z")
hook uo your volt meter to the full pack and take it for a ride. If you have a problem you will see a voltage drop. Then check each battery for a bad one. ---
**Author:** ![AssyRequired](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/assyrequired/32/7621_2.png) [@AssyRequired](https://community.electricforum.com/u/AssyRequired)\ **Post date:** [July 31, 2021, 3:12am UTC](https://community.electricforum.com/t/gem-e6-battery-pack/22029/12 "2021-07-31T03:12:25Z")
> [@JarJarJava](#): > > Need a baseline on a good one first. Yeah, that is a given. The _ **ONE** _ time I didn’t have time write a 73 line essay/explanation and you call me out on it! ---
**Author:** ![JarJarJava](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/jarjarjava/32/15158_2.png) [@JarJarJava](https://community.electricforum.com/u/JarJarJava)\ **Post date:** [July 31, 2021, 2:19pm UTC](https://community.electricforum.com/t/gem-e6-battery-pack/22029/13 "2021-07-31T14:19:05Z")
> [@AssyRequired](#): > > The _ **ONE** _ time I didn’t have time write a 73 line essay/explanation and you call me out on it! **BOOYAH!** Personally, I like Grant’s suggestion about using a load tester, you don’t really need historical data. It’s like the brake load test, when it tanks a bad battery, you know it. One of the reasons why I own a 400A load tester. Unlike the brake load test, you only beat up one battery at a time. Down side is, that for 9 batteries, I’d have to toss the load bank in the freezer of a bit every other test or so after the first few. Otherwise it will be so overheated that it won’t pull the desired amps. @grantwest . I’ve seen the combined per-cell average voltage of a fully charged 36 cell FLA pack, which was otherwise healthy save 4 of 6 cells cooked in one of the batteries, fall to below terminal voltage per cell under heavy load, So between 6 and 7V for that one battery is a possibility. ---
**Author:** ![GD\_Debre](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/gd_debre/32/15420_2.png) [@GD\_Debre](https://community.electricforum.com/u/GD_Debre)\ **Post date:** [August 1, 2021, 1:44am UTC](https://community.electricforum.com/t/gem-e6-battery-pack/22029/14 "2021-08-01T01:44:43Z")
This is what I found so far one of my batteries that was the terminal was burned shows 8.3 volts and when driving goes down to 6 and even 3 volts other batteries show 8.6 and when driving 8 volts so am guessing just buy one new battery right ??? ---
**Author:** ![JarJarJava](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/jarjarjava/32/15158_2.png) [@JarJarJava](https://community.electricforum.com/u/JarJarJava)\ **Post date:** [August 1, 2021, 2:26am UTC](https://community.electricforum.com/t/gem-e6-battery-pack/22029/15 "2021-08-01T02:26:28Z")
Yeaup. Just go replace that one for now ---
**Author:** ![LithiumGods](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/lithiumgods/32/672_2.png) [@LithiumGods](https://community.electricforum.com/u/LithiumGods)\ **Post date:** [August 1, 2021, 4:08am UTC](https://community.electricforum.com/t/gem-e6-battery-pack/22029/16 "2021-08-01T04:08:33Z")
wish you were close, have a few good used one for 100/ea