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#1
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External Battery Boost
I bought an "Auto Starter" that plugs into a car's DC outlet and
supposedly recharges a vehicle's weak battery. I plan to use it on my '85 Buick, but was wondering if it would cause any electical/computer problems if I had to use it on my 2002 CR-V. Who knows if this type of device is safe or not? |
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#2
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Since most of this batteries are little more then a bunch
of "D" cells, I wouldn't expect too much in the way of a recharge. A freind has a 1999? Toyota Corola and he bought one and when he left his lights on, the magic battery would not charge the Lead Acid to the point where it would even light up the headlamps. I have used a Panasonic LC-L1224PU 12V 24Amp/hour gell cell to start my 1985 Celica and my 1991 Honda Civic. I bought 2 Radio Shack #23-119 6V gell cells designed to power those little kid cars. While I bought them mainly for emergency use to power my ham and SW radios. I wired the to 6V batteries in series for 12V. So I decided to see if it would start a car. I had no trouble starting my 1985 Celica with this battery. My Civic is much easier to start. I got them on close out for 5$ each. I intend to put them in a mil surplus 223 ammo case and wire them into the Civics electrical system to they will stay charged. I had to remove the supplied 25A fuse and I intend to add some heavy duty (5/8" insulated bolts) to allow emergency jumping to my Civic. Unless you are willing and able to to something like this, I suspect those little emergency batteries are going to leave you stranded. I intend to use a 10Amp, 100PIV Si diode, in series with a 5 Amp fuse to keep the battery charged. The slight (0.7V) drop across the diode will leave plenty of voltage to keep the Radio Sahck battery cahrged. My Civic produces something like14.6V at any engine speed above idle. That gives 14.6-0.7V=13.9V for charging/. In a perfect world I would want ~13.69V to chanrge a gellcell. But 13.9V will work great, tough it might shorten the life of the gellcell. The last gellcell I bought before the Panasonic lasted for over 25 years. It might have lasted longer, but my homebuilt charger failed and applied 15V and the battery failed. GellCells are exactly cheap, but with some carefull shoping you can sometimes find them for pretty cheap. I got the Panasonic from a friend who works for an alarm company. "High Value Sites"( liquer stores etc) get new batteries every 18~24 months. The batteries are cheap and thier insurance demands no failures. WheelCahir rental and medical supply companies are also good places for older, but still functional batteries. You will have to roll your own case, charger etc, but you will have a much better product. Terry |
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