with the fuses welded in place, i've made a new insulator... | Tube🍂Time

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with the fuses welded in place, i've made a new insulator to cover their tabs and prevent them from shorting with the main battery negative terminal strip.

Like 17 September at 23:57 | Open on mastodon.social

7 comments

i've unfolded the cells now so they lay flat. i have to weld the two positive terminals (on the red wire, somewhat out of focus). the other little thing hanging free is the thermistor.

17 September at 23:59 | Open on mastodon.social

it's all reassembled now in the enclosure. the plastic strip holding the gold-plated terminals slots into the front of the case.

18 September at 0:00 | Open on mastodon.social

the schematic of the pack looks like this. it's two series strings of cells connected in parallel. the fuses prevent excess current from flowing.

18 September at 0:01 | Open on mastodon.social

aaaaand it didn't work! no life at all. why? the battery terminals inside the Thinkpad 700C are corroded! these should clean right up.

18 September at 0:02 | Open on mastodon.social

oooh it works! the battery gauge is uhh "imprecise." this is the DOS "POWER" command.

18 September at 0:03 | Open on mastodon.social

the status info from fdapm is very lol. "Battery quite full" 😆

18 September at 0:05 | Open on mastodon.social

Rue Mohr

@tubetime Wow, look at all the cells they needed for just 30 seconds of runtime.

18 September at 0:41 | Open on infosec.exchange