r/toughbook • u/JustSomeone202020 • Jul 13 '25

Are there any energy efficienciy improvements made in various revisions of the cf-20 units?

Just curious...

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u/RuggedOrDie Jul 15 '25

Not that I know of specifically but the CF-20 in general was a really good design for energy efficiency. It used a low voltage processor and due to it's designed efficiency the battery life was pretty good on it if you had two batteries.

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u/JustSomeone202020 Jul 16 '25

I meant any changes from lets say mk1 to mk4 or what not...as in I saw 2 models with various charge voltage and amps....which was interesting, yet nothign was marked differently...besides the serial numbers from A, to C

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u/RuggedOrDie Jul 16 '25

Yeah, sorry if my answer wasn't specific. I don't know of any specific energy efficiencies that were further developed from the MK1-MK2. Normally Panasonic doesn't change a model much between marks, they are intentionally kept to be extremely similar with little updates like the processor.

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u/JustSomeone202020 Jul 17 '25

well some I noticed take 16v some take 15.6-16v and have a different amp rating as well...so it seems that some got more slack/range there...but trying to figure out if they are newer or older units as the label is missing...

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u/RuggedOrDie Jul 17 '25

As far as I know all TOUGHBOOK OEM adapters are 15.6V. Some adapters may say 16V but I believe that's just rounded up. The Amperage range doesn't really matter other than how quickly the TOUGHBOOK charges. The higher the amperage the faster it charges. If you were to use a low amperage charger it's fine but for folks that use it in the vehicle they need the higher amperage so the computer doesn't drain faster than it charges. I like to use the 7.05A chargers myself.

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u/JustSomeone202020 Jul 18 '25

the fasteer the battery charges the shorter is its lifespan