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powering a laptop with a UPS?


Mike Darrett

Jan 1, 1970
Hi guys,

Just bought a (very) old refurbished laptop, 133 mhz, and of course
the battery is dead. (I knew this before buying of course, I but know
also plan to use it say at the kitchen table, when studying or doing
taxes for instance.) I thought of about 3 different options for
portable power (I had envisioned bringing the laptop to the bookstore
occasionally, or maybe while going fishing)

1. The laptop needs 18V, at 2A. I was envisioning 15 1.2V NiMH
1800mAh batteries tied in series, but this could get really expensive,
at circa $10/4pack of NiMH AA's. Ditto for C batteries; would last
longer, though.

2. Getting a deep-cycle 12VDC lead-acid battery, charge this at home,
connect say a 100 W inverter (or whatever is the smallest available)
to it, and plug in the laptop's power supply into the inverter.

3. Just buy a small UPS (uninterruptible power supply), charge it at
home, and bring the UPS and laptop with me (to the bookstore, on a
boat, etc.)

I'm leaning towards (3). Any suggestions? Anyone done this before?
Anyone recommend a good, small, lightweight UPS for powering a laptop?


Mike Darrett

Arthur Jernberg

Jan 1, 1970
Only if the mobile location does nt object to the noise produced by the five
minuite of use you will get from the ups. They are designed to allow a
controlled shutdown for a system during a power failure, not as a portable
power supply. You would be wiser to invest in a good battery and the proper