3lectrokid
Member
Hello everyone,
I have changed the battery (np1.2-12) inside the alarm recently and now I have a spare old battery **broken link removed**. Because I do a few experiments in my room I made a small power supply on the side of my breadboard consisting of a L7805 regulator and LED. I have been using my battery to power this to power some small circuits. Connecting an ammeter in series with the power supply tells me I only use about 50ma which is not much at all but this makes me ask the question when is my battery flat. even if my battery drains to 7 volts it will still easily power my circuit. however I have heard that if I drain my battery too much I will permanently damage the battery so I would like to know at what voltage at what current I need to charge the battery.
I have this bench top power supply **broken link removed**
I was wondering if it was possible to charge my battery with this power supply and if so how without using much or any circuitry. What voltage should I use.
These datasheets may be helpful
https://docs-europe.origin.electrocomponents.com/webdocs/0111/0900766b80111548.pdf
https://www.yuasabatteries.com/pdfs/NP_1.2_12_DataSheet.pdf
Thanks for reading and any help would be appreciated
I have changed the battery (np1.2-12) inside the alarm recently and now I have a spare old battery **broken link removed**. Because I do a few experiments in my room I made a small power supply on the side of my breadboard consisting of a L7805 regulator and LED. I have been using my battery to power this to power some small circuits. Connecting an ammeter in series with the power supply tells me I only use about 50ma which is not much at all but this makes me ask the question when is my battery flat. even if my battery drains to 7 volts it will still easily power my circuit. however I have heard that if I drain my battery too much I will permanently damage the battery so I would like to know at what voltage at what current I need to charge the battery.
I have this bench top power supply **broken link removed**
I was wondering if it was possible to charge my battery with this power supply and if so how without using much or any circuitry. What voltage should I use.
These datasheets may be helpful
https://docs-europe.origin.electrocomponents.com/webdocs/0111/0900766b80111548.pdf
https://www.yuasabatteries.com/pdfs/NP_1.2_12_DataSheet.pdf
Thanks for reading and any help would be appreciated
Last edited: