# 4s bms with P- and B-. I cant find this kind of bms with only P- and B- **URL:** \ **Category:** parts help\ **Created:** [April 25, 2025, 7:24am UTC](https://forum.fritzing.org/t/4s-bms-with-p-and-b-i-cant-find-this-kind-of-bms-with-only-p-and-b/28325 "2025-04-25T07:24:15Z")\ **Posts on this page:** 12\ **Page:** 1
**Author:** ![Isoe](https://forum.fritzing.org/letter_avatar_proxy/v4/letter/i/e47774/32.png) [@Isoe](https://forum.fritzing.org/u/Isoe)\ **Post date:** [April 25, 2025, 7:24am UTC](https://forum.fritzing.org/t/4s-bms-with-p-and-b-i-cant-find-this-kind-of-bms-with-only-p-and-b/28325/1 "2025-04-25T07:24:15Z")
**Name of the part** 4s BMS **Top view** This picture shows the part from above, so that is easy to see were connectors should go, and which diameter they have. ![bms4s](https://forum.fritzing.org/uploads/default/original/3X/7/6/765a0dc19fe3b03af756f344c4dd14b857886548.jpeg) Does anyone know where can i get this 4s bms ? ---
**Author:** ![RAPTOR7762](https://forum.fritzing.org/user_avatar/forum.fritzing.org/raptor7762/32/22620_2.png) [@RAPTOR7762](https://forum.fritzing.org/u/RAPTOR7762)\ **Post date:** [April 25, 2025, 9:29am UTC](https://forum.fritzing.org/t/4s-bms-with-p-and-b-i-cant-find-this-kind-of-bms-with-only-p-and-b/28325/2 "2025-04-25T09:29:09Z")
@Isoe Attach the website of the part. You deleted the entire template (and I’m not happy) ---
**Author:** ![Isoe](https://forum.fritzing.org/letter_avatar_proxy/v4/letter/i/e47774/32.png) [@Isoe](https://forum.fritzing.org/u/Isoe)\ **Post date:** [April 26, 2025, 4:44am UTC](https://forum.fritzing.org/t/4s-bms-with-p-and-b-i-cant-find-this-kind-of-bms-with-only-p-and-b/28325/3 "2025-04-26T04:44:56Z")
My bad, here’s the link [4S 12V 120A Board with Battery Balance Board R2M31381 | eBay](https://www.ebay.com/itm/276847857194) ---
**Author:** ![RAPTOR7762](https://forum.fritzing.org/user_avatar/forum.fritzing.org/raptor7762/32/22620_2.png) [@RAPTOR7762](https://forum.fritzing.org/u/RAPTOR7762)\ **Post date:** [April 26, 2025, 1:32pm UTC](https://forum.fritzing.org/t/4s-bms-with-p-and-b-i-cant-find-this-kind-of-bms-with-only-p-and-b/28325/4 "2025-04-26T13:32:35Z")
Still not enough information, and I need the dimensions and a good front view (flat image) of the part ---
**Author:** ![Isoe](https://forum.fritzing.org/letter_avatar_proxy/v4/letter/i/e47774/32.png) [@Isoe](https://forum.fritzing.org/u/Isoe)\ **Post date:** [April 26, 2025, 1:45pm UTC](https://forum.fritzing.org/t/4s-bms-with-p-and-b-i-cant-find-this-kind-of-bms-with-only-p-and-b/28325/5 "2025-04-26T13:45:28Z")
[bms-5s-balancing.fzpz](https://forum.fritzing.org/uploads/short-url/8201TytlfT5MY3o6pGBmxlVfJ7b.fzpz) (19.4 KB) Possible for you to modify from here? I just dont need the C- and B4 port. ---
**Author:** ![RAPTOR7762](https://forum.fritzing.org/user_avatar/forum.fritzing.org/raptor7762/32/22620_2.png) [@RAPTOR7762](https://forum.fritzing.org/u/RAPTOR7762)\ **Post date:** [April 26, 2025, 1:48pm UTC](https://forum.fritzing.org/t/4s-bms-with-p-and-b-i-cant-find-this-kind-of-bms-with-only-p-and-b/28325/6 "2025-04-26T13:48:28Z")
I need the website with dimensions for the modification ---
**Author:** ![Isoe](https://forum.fritzing.org/letter_avatar_proxy/v4/letter/i/e47774/32.png) [@Isoe](https://forum.fritzing.org/u/Isoe)\ **Post date:** [April 26, 2025, 2:01pm UTC](https://forum.fritzing.org/t/4s-bms-with-p-and-b-i-cant-find-this-kind-of-bms-with-only-p-and-b/28325/7 "2025-04-26T14:01:03Z")
alright, i got this pic for the initial bms i was asking for. The dimension is 56x86x14mm and the view of bms inside this picture is all i have. sorry bout that ![4s bms](https://forum.fritzing.org/uploads/default/original/3X/a/e/ae202b44ba482754acb12cd95850969dfcb7a1f7.jpeg) ---
**Author:** ![vanepp](https://forum.fritzing.org/user_avatar/forum.fritzing.org/vanepp/32/4426_2.png) [@vanepp](https://forum.fritzing.org/u/vanepp)\ **Post date:** [April 26, 2025, 2:13pm UTC](https://forum.fritzing.org/t/4s-bms-with-p-and-b-i-cant-find-this-kind-of-bms-with-only-p-and-b/28325/8 "2025-04-26T14:13:50Z")
This web site (which is presumably where this image came from) gives the information @RAPTOR7762 needs to make a part for this. > **[3s 4s 12V 120a 150a 230a 300a bms Li-Ion Lifepo4 Lithium-Batterie-Schutz...](https://de.aliexpress.com/item/1005005857474175.html?src=google&pdp_npi=4%40dis%21CAD%2125.08%2112.89%21%21%21%21%21%40%2112000034597159060%21ppc%21%21%21&src=google&albch=shopping&acnt=631-313-3945&isdl=y&slnk=&plac=&mtctp=&albbt=Google_7_shopping&aff_platform=google&aff_short_key=UneMJZVf&gclsrc=aw.ds&albagn=888888&ds_e_adid=&ds_e_matchtype=&ds_e_device=c&ds_e_network=x&ds_e_product_group_id=&ds_e_product_id=en1005005857474175&ds_e_product_merchant_id=768419881&ds_e_product_country=CA&ds_e_product_language=en&ds_e_product_channel=online&ds_e_product_store_id=&ds_url_v=2&albcp=19366866438&albag=&isSmbAutoCall=false&needSmbHouyi=false&gad_source=1&gclid=EAIaIQobChMIiZOm2u_1jAMVAwutBh015TmfEAQYBCABEgKRnfD_BwE&gatewayAdapt=glo2deu)** > > Smarter Shopping, Better Living! Aliexpress.com and is the information he is looking for. There are appropriate images in the description section of this web site for making a part. Peter ---
**Author:** ![RAPTOR7762](https://forum.fritzing.org/user_avatar/forum.fritzing.org/raptor7762/32/22620_2.png) [@RAPTOR7762](https://forum.fritzing.org/u/RAPTOR7762)\ **Post date:** [April 26, 2025, 3:29pm UTC](https://forum.fritzing.org/t/4s-bms-with-p-and-b-i-cant-find-this-kind-of-bms-with-only-p-and-b/28325/9 "2025-04-26T15:29:44Z")
[12V 120A Board with Battery Balance Board R2M31381-fixed.fzpz](https://forum.fritzing.org/uploads/short-url/1LayJUwX7zbiZVy60sBVR5WGQhD.fzpz) (33.0 KB) @Isoe This should be the part you want. Note that PCB suppressed as not useful ---
**Author:** ![RAPTOR7762](https://forum.fritzing.org/user_avatar/forum.fritzing.org/raptor7762/32/22620_2.png) [@RAPTOR7762](https://forum.fritzing.org/u/RAPTOR7762)\ **Post date:** [April 27, 2025, 3:02am UTC](https://forum.fritzing.org/t/4s-bms-with-p-and-b-i-cant-find-this-kind-of-bms-with-only-p-and-b/28325/10 "2025-04-27T03:02:14Z")
@Isoe Apologies the part above has issues. I’m correcting it now ---
**Author:** ![RAPTOR7762](https://forum.fritzing.org/user_avatar/forum.fritzing.org/raptor7762/32/22620_2.png) [@RAPTOR7762](https://forum.fritzing.org/u/RAPTOR7762)\ **Post date:** [April 27, 2025, 2:30pm UTC](https://forum.fritzing.org/t/4s-bms-with-p-and-b-i-cant-find-this-kind-of-bms-with-only-p-and-b/28325/11 "2025-04-27T14:30:40Z")
@Isoe Edited post above ---
**Author:** ![Isoe](https://forum.fritzing.org/letter_avatar_proxy/v4/letter/i/e47774/32.png) [@Isoe](https://forum.fritzing.org/u/Isoe)\ **Post date:** [April 27, 2025, 4:47pm UTC](https://forum.fritzing.org/t/4s-bms-with-p-and-b-i-cant-find-this-kind-of-bms-with-only-p-and-b/28325/12 "2025-04-27T16:47:21Z")
alright thank you so much !!!