P90 large battery options

[mirinjawbro]

Hello all.

sadly can only run (i think) a 7.1 ish V battery in a normal P90 stock

i don't really want to run externally.

any ideas?

thanks

 

[Punisher3990]

I runs this:

P90 Battery Extension Unit — Airsoft Tailoring

Battery compartment extension unit, designed for the TM P90 but should be compatible with other brands based on the TM. This unit adds 40mm internal depth, perfect for larger capacity LiPos. Other sizes can be made on request. 3D Printed in a choice of Black/Grey Carbon Fibre reinforced PETG or Bl

airsofttailoring.co.uk

He also does quite possibly the best P90 single point sling I have used, Highly recommend:

P90 Sling Harness V2 (new pictures so follow) — Airsoft Tailoring

V2 swaps the Velcro for triglides. This allows me to streamline production and for greater variation between brands. It also allows 1 product to cover the standard and extended P90. Either fold the excess away using the triglide or cut and re-seal the end. (New pictures and video to fol

airsofttailoring.co.uk

 

[Colin Allen]

I am not sure what you mean by large, but I run this in mine.

 

[Colin Allen]

Error

 

[mirinjawbro]

sorry this is king arms.

i have a 11.1 but its way to "fat" to fit normally. hoping the extensions can have it all

 

[Galvatron]

https://www.bespokeairsoft.co.uk/big-foot-heat-lipo-battery-2200-mah-7-4c-25c

Prior to upgrading with the Perun mosfet (Deans battery connection), I used one of these.

 

[Colin Allen]

sorry this is king arms.

i have a 11.1 but its way to "fat" to fit normally. hoping the extensions can have it all

Click to shrink...

I think the battery space is pretty much the same in different makes.

 

[Cannonfodder]

Isn't the king arms a clone of the TM?

 

[mirinjawbro]

im not sure on that. have been asking claude and google AI and both say different things. one says you MUST change the piston to a metal tooth one. other says a 11.1 volt bigger battery will be fine. i then ask whos better and they both disagree with eachother

 

[Punisher3990]

I normally only use 11.1V batteries if a RIF has a MOSFET or ETU; otherwise, you risk premature wear on the trigger contacts due to arcing and other stuff.

It’s also worth mentioning that the Perun P90 MOSFET is listed as “mostly compatible but requires modification” for the King Arms and SSR90, which suggests there are some internal differences compared to a standard TM-spec P90 or direct clone. I don't have a KA P90 so I am unsure of the differences.

ChatGPT response: Most stock P90s, including King Arms variants, use traditional trigger contacts. An 11.1v battery increases electrical arcing and can wear or burn the trigger contacts over time. Community advice around P90s in general is pretty consistent: 11.1v is possible, but a MOSFET is strongly recommended for reliability and to prevent damaging the internals as much as possible.

 

[mirinjawbro]

seems like this could easily be the same cost as the gun was to begin with