# Extra battery

**URL:** <https://community.frame.work/t/extra-battery/6555>\
**Category:** Creators & Developers\
**Tags:** project\
**Created:** [September 10, 2021, 9:12pm UTC](https://community.frame.work/t/extra-battery/6555 "2021-09-10T21:12:10Z")\
**Posts on this page:** 1\
**Showing post:** 4

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**Author:** ![Tyler\_S](https://avatars.discourse-cdn.com/v4/letter/t/dc4da7/32.png) [@Tyler\_S](https://community.frame.work/u/Tyler_S)\
**Post date:** [September 13, 2021, 2:12pm UTC](https://community.frame.work/t/extra-battery/6555/4 "2021-09-13T14:12:27Z")

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@Samuel_Murray I thought the same thing but was corrected on [DC plug expansion card for compatibility with more power adapters - #7 by GameFan](http://community.frame.work/t/dc-plug-expansion-card-for-compatibility-with-more-power-adapters/6480/7)

> [@DC plug expansion card for compatibility with more power adapters](http://community.frame.work/t/dc-plug-expansion-card-for-compatibility-with-more-power-adapters/6480/6):
>
> you would need to comply with the PD protocol and advertise the correct power to the device, and also support 5Vsafe to start negotiation of a PD contract.  
> You cannot just apply power to the type-c input as the laptop needs to know the charger power to prevent overloading the charger as we control the power envelope of the system based on the negotiated power contract.
> 
> I am a lot more excited about PD-Legacy charger adapters so I can continue to use my old laptops and only need type-c chargers :D.

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