# Help me with my battery charger

**URL:** <https://boards.straightdope.com/t/help-me-with-my-battery-charger/191276>\
**Category:** Factual Questions\
**Created:** [July 27, 2003, 5:00pm UTC](https://boards.straightdope.com/t/help-me-with-my-battery-charger/191276 "2003-07-27T17:00:51Z")\
**Posts on this page:** 4\
**Page:** 2

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**Author:** ![jojoringo](https://avatars.discourse-cdn.com/v4/letter/j/b2d939/32.png) [@jojoringo](https://boards.straightdope.com/u/jojoringo)\
**Post date:** [June 5, 2014, 9:10pm UTC](https://boards.straightdope.com/t/help-me-with-my-battery-charger/191276/21 "2014-06-05T21:10:10Z")

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Thanks for helping me to charge my drill with the proper polarity - now who wins what?

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**Author:** ![johnpost](https://avatars.discourse-cdn.com/v4/letter/j/f17d59/32.png) [@johnpost](https://boards.straightdope.com/u/johnpost)\
**Post date:** [June 5, 2014, 9:18pm UTC](https://boards.straightdope.com/t/help-me-with-my-battery-charger/191276/22 "2014-06-05T21:18:29Z")

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quint zombie or no

you win a charged battery.

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**Author:** ![shahidhaque](https://avatars.discourse-cdn.com/v4/letter/s/9de053/32.png) [@shahidhaque](https://boards.straightdope.com/u/shahidhaque)\
**Post date:** [January 21, 2015, 3:47am UTC](https://boards.straightdope.com/t/help-me-with-my-battery-charger/191276/23 "2015-01-21T03:47:37Z")

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Charger/adapter for B & D 9089 drill (i.e.418337-06) gives 8 volts AC output @ 250Ma. Since there is a diode inside the drill (charging circuit) so it is half-wave rectification, i.e giving about 4 volts dc to charge the battery. You may be able to use any 4 to 5 volts DC output adapter with the same or higher amp rating, which fits the receptacle in the drill. The matter of negative/positive side has already been addressed in previous posts.

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**Author:** ![engineer\_comp\_geek](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/engineer_comp_geek/32/504_2.png) [@engineer\_comp\_geek](https://boards.straightdope.com/u/engineer_comp_geek)\
**Post date:** [January 21, 2015, 6:39am UTC](https://boards.straightdope.com/t/help-me-with-my-battery-charger/191276/24 "2015-01-21T06:39:18Z")

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**Moderator Action**

Let’s let this poor zombie rest in peace.

If anyone has new charger issues, please feel free to start a new thread.

Thread closed.

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