# Front mount battery in early Gem **URL:** \ **Category:** GEM Forum\ **Created:** [March 29, 2022, 3:31am UTC](https://community.electricforum.com/t/front-mount-battery-in-early-gem/23842 "2022-03-29T03:31:48Z")\ **Posts on this page:** 20\ **Page:** 7
**Author:** ![dougl](https://avatars.discourse-cdn.com/v4/letter/d/b19c9b/32.png) [@dougl](https://community.electricforum.com/u/dougl)\ **Post date:** [May 26, 2022, 12:22am UTC](https://community.electricforum.com/t/front-mount-battery-in-early-gem/23842/130 "2022-05-26T00:22:12Z")
or 3D print a couple of covers… ![wire-hole-cover](https://canada1.discourse-cdn.com/flex030/uploads/electricforum/original/2X/6/6d7073e69511b37596767570c43856a6bc261092.png) it would print better as a half cylinder running the length and a half sphere at the top rounded side but I think you get the idea. It would not only keep moisture out but also greatly limit the cable movement. ---
**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:** [May 26, 2022, 1:25am UTC](https://community.electricforum.com/t/front-mount-battery-in-early-gem/23842/131 "2022-05-26T01:25:16Z")
Y- I was going to come back on those holes. I like the idea of the down facing vent/wire exit. ---
**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:** [May 26, 2022, 1:54am UTC](https://community.electricforum.com/t/front-mount-battery-in-early-gem/23842/132 "2022-05-26T01:54:12Z")
How about a tube of GE Silicone II? It’s like $4 and no fuss, no muss… ---
**Author:** ![Derrick](https://avatars.discourse-cdn.com/v4/letter/d/d9b06d/32.png) [@Derrick](https://community.electricforum.com/u/Derrick)\ **Post date:** [May 26, 2022, 2:28am UTC](https://community.electricforum.com/t/front-mount-battery-in-early-gem/23842/133 "2022-05-26T02:28:39Z")
I used these for my toolbox battery box > **[Amazon.com: Fastronix Premium High Current 3/8" Thru Panel Battery Terminal...](https://www.amazon.com/Fastronix-Premium-Current-Terminal-Connectors/dp/B079K5HB79)** > > Buy Fastronix Premium High Current 3/8" Thru Panel Battery Terminal Connectors: Terminals & Ends - Amazon.com ✓ FREE DELIVERY possible on eligible purchases ---
**Author:** ![dougl](https://avatars.discourse-cdn.com/v4/letter/d/b19c9b/32.png) [@dougl](https://community.electricforum.com/u/dougl)\ **Post date:** [May 26, 2022, 4:55am UTC](https://community.electricforum.com/t/front-mount-battery-in-early-gem/23842/134 "2022-05-26T04:55:09Z")
a bit cleaner design. base flange = 200mm long x 75mm wide. ![wire-hole-cover-round](https://canada1.discourse-cdn.com/flex030/uploads/electricforum/original/2X/a/a7d581c31b9df67a98654127aa5b2cc72852e876.png) ---
**Author:** ![Eingarrett](https://avatars.discourse-cdn.com/v4/letter/e/c37758/32.png) [@Eingarrett](https://community.electricforum.com/u/Eingarrett)\ **Post date:** [May 27, 2022, 5:46pm UTC](https://community.electricforum.com/t/front-mount-battery-in-early-gem/23842/135 "2022-05-27T17:46:56Z")
I am going to buy a new battery charger for my 2000 e825 GEM. I’m replacing the Schott 72v charger. Now that I have the Lithium battery pack, what charger would you recommend. Thank you for your help. ---
**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:** [May 27, 2022, 6:02pm UTC](https://community.electricforum.com/t/front-mount-battery-in-early-gem/23842/136 "2022-05-27T18:02:37Z")
What voltage? I have J1772 29 amp chargers fixed at 86v. > [@Dave’s 220v Gen car Charger J1772 Ready](https://community.electricforum.com/t/dave-s-220v-gen-car-charger-j1772-ready/15820): > ---
**Author:** ![Eingarrett](https://avatars.discourse-cdn.com/v4/letter/e/c37758/32.png) [@Eingarrett](https://community.electricforum.com/u/Eingarrett)\ **Post date:** [May 27, 2022, 8:54pm UTC](https://community.electricforum.com/t/front-mount-battery-in-early-gem/23842/137 "2022-05-27T20:54:09Z")
I have 22 batteries, so I believe you measured that out at 78 volts per the image in this thread. Again my old system was 72 volts (6x12v Lead Acid). Hope that answered your question. Thx ---
**Author:** ![Eingarrett](https://avatars.discourse-cdn.com/v4/letter/e/c37758/32.png) [@Eingarrett](https://community.electricforum.com/u/Eingarrett)\ **Post date:** [May 27, 2022, 9:31pm UTC](https://community.electricforum.com/t/front-mount-battery-in-early-gem/23842/138 "2022-05-27T21:31:23Z")
This would be an onboard charger, 110v. Thx ---
**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:** [May 27, 2022, 9:45pm UTC](https://community.electricforum.com/t/front-mount-battery-in-early-gem/23842/139 "2022-05-27T21:45:31Z")
How are you doing with your pack install? I’d finish/get that in, test run the car around the block a bit then try the schott charger. (Or does it not work at all?) Too many changes at once is sometimes a handful to work out. ---
**Author:** ![Eingarrett](https://avatars.discourse-cdn.com/v4/letter/e/c37758/32.png) [@Eingarrett](https://community.electricforum.com/u/Eingarrett)\ **Post date:** [May 27, 2022, 10:36pm UTC](https://community.electricforum.com/t/front-mount-battery-in-early-gem/23842/140 "2022-05-27T22:36:45Z")
I just received my two replacement batteries from Dave. So hopefully I get time this weekend to wire up the pack and install. Regarding the charger, I’m just about finished putting together another 2000 GEM e825 for a friend of mine. His Schott charger is shot 🙂 and I was going to replace it with mine and then buy another charger for myself. But you are right, I’ll get mine together first and go from there. Thx again for the guidance, you all are great. ---
**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:** [May 27, 2022, 10:44pm UTC](https://community.electricforum.com/t/front-mount-battery-in-early-gem/23842/141 "2022-05-27T22:44:33Z")
> [@Eingarrett](#): > > Thx again for the guidance, you all are great. No. We’re gems. Bada-bum! ---
**Author:** ![Eingarrett](https://avatars.discourse-cdn.com/v4/letter/e/c37758/32.png) [@Eingarrett](https://community.electricforum.com/u/Eingarrett)\ **Post date:** [June 2, 2022, 3:18pm UTC](https://community.electricforum.com/t/front-mount-battery-in-early-gem/23842/142 "2022-06-02T15:18:39Z")
Question for Inwo, on the BMS for this application, I see two wires marked for battery number 22 (the last battery). Do both wires go to the positive terminal or one to each side or …? Thank you. Dan ---
**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:** [June 2, 2022, 3:35pm UTC](https://community.electricforum.com/t/front-mount-battery-in-early-gem/23842/143 "2022-06-02T15:35:08Z")
Both wires will need to go to that last post. One of them will be the balance wire #22 just like 21. If you follow it back to the pins it will be right next to pin 21 in the header plug. The other will be the power wire for the BMS. It may be a different color. If you follow it back to the pins it will be the last one in the plug. There will be two spaces skipped (for optional cells 23 and 24 which you do not have). ---
**Author:** ![Eingarrett](https://avatars.discourse-cdn.com/v4/letter/e/c37758/32.png) [@Eingarrett](https://community.electricforum.com/u/Eingarrett)\ **Post date:** [June 2, 2022, 4:22pm UTC](https://community.electricforum.com/t/front-mount-battery-in-early-gem/23842/144 "2022-06-02T16:22:28Z")
Got it, thank you, much appreciated. ---
**Author:** ![Eingarrett](https://avatars.discourse-cdn.com/v4/letter/e/c37758/32.png) [@Eingarrett](https://community.electricforum.com/u/Eingarrett)\ **Post date:** [June 3, 2022, 2:47pm UTC](https://community.electricforum.com/t/front-mount-battery-in-early-gem/23842/145 "2022-06-03T14:47:38Z")
Hello, I thought I followed the directions well regarding the battery pack connections and start up process for the BMS. Currently I have a voltage reading of 0.13 between the positive and negative side of the battery pack and I cannot see the BMS on a bluetooth scan. Any suggestions are welcome. I can post pictures if needed. Thx ---
**Author:** ![Eingarrett](https://avatars.discourse-cdn.com/v4/letter/e/c37758/32.png) [@Eingarrett](https://community.electricforum.com/u/Eingarrett)\ **Post date:** [June 3, 2022, 3:17pm UTC](https://community.electricforum.com/t/front-mount-battery-in-early-gem/23842/146 "2022-06-03T15:17:09Z")
![Battery Connect 1](https://canada1.discourse-cdn.com/flex030/uploads/electricforum/original/2X/3/384c8872e370d2eecb18d9b1099ee19725f882c7.jpeg) ![Battery Connect 2](https://canada1.discourse-cdn.com/flex030/uploads/electricforum/original/2X/0/0fc7c465e2acac573dc038be2c757848e22a78d8.jpeg) ---
**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:** [June 3, 2022, 3:43pm UTC](https://community.electricforum.com/t/front-mount-battery-in-early-gem/23842/147 "2022-06-03T15:43:17Z")
Did you jump start the BMS with a 9v battery? Is there a red light blinking on the BMS? ---
**Author:** ![djgabriel2004](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/djgabriel2004/32/12304_2.png) [@djgabriel2004](https://community.electricforum.com/u/djgabriel2004)\ **Post date:** [June 3, 2022, 3:43pm UTC](https://community.electricforum.com/t/front-mount-battery-in-early-gem/23842/148 "2022-06-03T15:43:33Z")
Is the bms awake?? connect a 9v battery between B- and P- from the bms ---
**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:** [June 3, 2022, 3:45pm UTC](https://community.electricforum.com/t/front-mount-battery-in-early-gem/23842/149 "2022-06-03T15:45:31Z")
Also- the BMS will start up with the output FETs turned off. You will not see anything on the output yet. [Previous page](https://community.electricforum.com/t/front-mount-battery-in-early-gem/23842.md?page=6) [Next page](https://community.electricforum.com/t/front-mount-battery-in-early-gem/23842.md?page=8)