Quote:
Originally Posted by Manav
Since we are on the topic just a quick one my Toshiba A300 requires 19V 6.32A and I have a Diamec 12V 26AH Gel battery. Will that work?
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I would expect that putting 12V into the laptop which requires 19V won't work, sorry. You will need a DC-DC inverter along the lines of the ones we have been discussing. It looks like the inverter in post #12 (thanks Malcolm) will suit your laptop nicely - but check whether it has the right plug tip.
Once you have the voltage right, then you can think about current. Now if your laptop is really drawing 6A @ 19V, then expect the inverter be drawing 9.5 or 10A from the 12V battery. You'd be lucky to get two hours out of your 26AH battery.
You may have to work with your laptop settings to reduce that curent draw. As Bryan and I were discussing, set any disk drives to spin down after a short delay. Run screen at low brightness. Remove as many power loads as you can. Eg, use touchpad rather than an external mouse etc.