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Discussion around the Framework mission of building products that last longer by making them upgradeable, customizable, and repairable. Consumer electronics can be better for you and for the environment.

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How many MAh is the 55 watt hour battery? (alien.top)

submitted 1 year ago by Notre-dame-fan@alien.top to c/framework@hardware.watch

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Hi guys, I’m looking to get an AMD framework, and I was just wondering if anyone knew the mAh of the 55-watt-hour battery? The reason I ask is because I’m looking at buying a portable charger, specifically this one: [https://www.baseus.com/products/adaman-power-bank-65w-20000mah?variant=39912115798093], and I was curious how much it’ll charge the framework when the framework is at rest or if it will sustain it while I’m doing light to moderate loads. The reason I ask is because I’m kinda new to this and looking to use the power bank as a charger since I can’t plug the laptop in myself when I’m out and about. (I’m in a wheelchair and can never reach wall outlets.) Thanks!

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[–] cronosaurusrex@alien.top 1 points 1 year ago (1 children)

Amp hours and watt hours are related by voltage since 1W = 1v x 1A

Therefore since the portable battery pack is using lithium ion cells with a nominal voltage of 3.7v: 20,000mAh x 3.7v = 74,000mWh = 74Wh

That's actually more than I was expecting, I don't know why, I guess we all learn something new every day. It's also more than the framework battery, though I wouldn't expect it to be a straightforward 1 1/3 charge for the laptop since there will be inefficiencies in the system. I hope this helps!

[–] Particular_Pizza_542@alien.top 1 points 1 year ago (1 children)

The framework battery is not 3.7v. Cells can be combined in series (s) or parallel (p). You would describe a battery similar to 10s3p, meaning 10 cells in series (37 volts) in 3 parallels, for a total of 30 cells.

The frame.work battery is a 15.4 VDC battery, with a capacity of 3678 mAh. Meaning its Watt-hours is 15.4 x 3.678 or ~56.6 Wh.

[–] K0nr4d@alien.top 1 points 1 year ago (1 children)

Correct, but the powerbank is 3.7V, which the above comment was talking about...

[–] Particular_Pizza_542@alien.top 1 points 1 year ago

I uh, .. missed that part.