News for hackers. Stuff that matters.

A comment on Bop Spotter. Parent comment

Re:Bop Spotter by oorza on Monday September 30, 2024 @08:26PM (#41703512)
If 2% of the battery is 2% of 3000mAh (which is probably a generous over-estimate of the phone's capacity), that means the phone pulls ~60mA.

You can buy a 60,000 mAh battery (or build one) for about $50, which would buy this device 10,000 hours, or round it down and call it 1 year.

[ Parent | on HN ]
Re:Bop Spotter by walz on Monday September 30, 2024 @08:38PM (#41703585)
60,000 divided by 60 is 1000, not 10,000. So only about a month, still a lot of time!

The phone has 4,000mAh, too.

[ Parent | on HN ]
Re:Bop Spotter by xk3 on Monday September 30, 2024 @10:38PM (#41704164)
It uses solar power, right? So I think it was built with that in mind. charge during the day and run until it loses power at night
[ Parent | on HN ]
Re:Bop Spotter by authorfly on Tuesday October 01, 2024 @07:03AM (#41706808)
How big are 60k mAh safe batteries?

I know eBikes are a massive step up from laptop batteries (seemingly better for the density too somehow?)

[ Parent | on HN ]
Re:Bop Spotter by kotaKat on Tuesday October 01, 2024 @12:59PM (#41711077)
https://www.amazon.com/dp/B0CZJDVDLC

This little no-name 185Wh battery pack is $40 right now with the 50% coupon code and would probably work great. (I picked one up recently for another project and it actually does deliver as advertised performance.)

[ Parent | on HN ]
Re:Bop Spotter by s2l on Tuesday October 01, 2024 @09:14PM (#41716254)
For another use case, I experienced that the phone battery starts swelling after few months. It was an indoor setup and I had removed the phone backcover to avoid overheating.
[ Parent | on HN ]