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laptop batteries

I have a Compaq Presario V5000 that uses a HSTNN-IB17 battery. I have one extra and I just purchased another not realizing the rating. In all three cases, they are rated at 10.8 volts. But the two that I already had are rated at 4.0Ahr and the new one it says 43Wh. So Im confused as to the difference between the Ahr rating and the Wh rating.

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In reply to: laptop batteries

A-hr refers to "Ampre hour", a measure of the electric charge.
W-h refers to Watt-hour - the energy of the battery.

Relationship: Ahr multiplied by voltage gives Wh.

In your case, 4Ah X 10.8 volts gives 43.20Wa, i.e. a 10.80 volts battery rated at 4Ahr is equivalent to one of 43Wh as long as the voltage is the same.
(E.& O. E.)

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In reply to: Batteries...

Am I correct in assuming that the two batteries are basically the same but that they just used different rating styles and that I can use the batery safely.

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Are they made by someone we know?

In reply to: safe

There are some ultra-cheap laptop batteries and by now you've read about recalls and more. If these are both from HP then I'm going to write it's fine. The important item is that voltage rating and that you use the same battery technology as the original. That is, LiON or LiPO is replaced with same...


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In reply to: Are they made by someone we know?

These batteries are Authentic HP batteries. The only visable difference inthe two is the before mentioned 43Wh and 4.0 Ahr rating on them. I didnt want to charge the new one (43ahr) before I checked to see if I would damage the laptop.

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(NT) Looks fine from here.

In reply to: same

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If you want to be sure...

In reply to: same

...check for "recommandated replacements" at the owner's manual. On the battery itself, or its packaging, look for " For (model of the laptop). Use genuine HP products to be sure. You can also ask ast HP support.

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