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A comment on Show HN: I'm 48 and finally learning how to be a game developer. Parent comment

Re:Show HN: I'm 48 and finally learning how to be a game dev... by qiqitori on Tuesday November 09, 2021 @08:28PM (#29170068)
(I don't know how much you know about electronics so sorry if I'm stating the obvious here)

9V batteries sound and look like they should last long, but putting 6 1.5V batteries in series should last much longer. 9V batteries have a typical capacity of ~550 mAh, 1.5V batteries (even rechargeable ones) have a typical capacity of 2000~3000 mAh.

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Re:Show HN: I'm 48 and finally learning how to be a game dev... by bananabat on Tuesday November 09, 2021 @09:25PM (#29170385)
I'm glad my lil research has been validated. Last week I bought one of those adapter cases that accommodate 6 1.5Vs but have 9V terminals. Now how to tape that case to my little robot.

And I don't know much, so thank you.

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Re:Show HN: I'm 48 and finally learning how to be a game dev... by andylynch on Wednesday November 10, 2021 @04:54AM (#29172941)
Of course 9v batteries are just six 1.5 cells in a rectangular pack- often they are even made of round cells like AAA, only much smaller.
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Re:Show HN: I'm 48 and finally learning how to be a game dev... by StevenWaterman on Wednesday November 10, 2021 @06:36AM (#29173572)
They're actually AAAA cells!
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Re:Show HN: I'm 48 and finally learning how to be a game dev... by bananabat on Wednesday November 10, 2021 @11:33AM (#29176623)
How many As are there in batteries?
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