Gallium is soft metal. Melts in room temrature. I read about Maganese Oxide pellets can be used in place. I would have to research more tho. I would obtain it if it's available in my area and if it's not expensive tho. Problem with Aluminuim is that water can coat Aluminuim w/ oxide. Either scrape clean the aluminuim or drop in fresh one. They do not say how long aluminuim become oxidated before it become "clogged".
There are battery powered mower in use today. I saw two different electric mowers on TV ads. One use 60V battery (Remington brand). I would not trust using battery cuz of it's short lifespan if charge/discharge cycles over 500 times. Cost too much to replace rechargeable batteries. Also My lawn is 10,000 sq ft and it would take 4 to 6 batteries changes to finish the lawn. Not worth it.
I was thinking that if I had 12vdc or 24v dc 2 or 3 hp electric motor, I would have try "backfeeding" system to keep mower running long time or forever LOL. Just like self propelled mower that have pulley and blade on it's shaft. Do same thing on electric motor and use cute little alternator (I found Ford Fiesta's small alternator size of hand!! cute!) rigged to shaft pulley. Then hook alternator directly to battery and battery hook to motor.
OR
If there are no 2 or 3 hp DC motor, The I would use alternative are 12vdc/120vac inverter in place to power 120v 2 or 3 hp AC motor. They do sells 700 watt to 2,000 watt inverters.
Problem is that there may be a drag on alternator cuz it act like "electric brake" if full load are being place on alternator. Thus will weakens charging system anyway and everything else would crash.. Can use permanent magnet generator in place.
Catty
