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mistercrash · 01.23.2010, 08:10 PM

My son has been a very good boy at school lately so I thought it was finally time for him to have his new GERBE. The weather was nice today with temperature at 31 degrees Fahrenheit. Here's a small movie of the big unveiling. It's short and boring

So there were two waterproof ERBEs running in the snow today, we went through two sets of lifepo4 packs each until the truck came to a slow crawl. The water proofness proved to be excellent again on both ERBEs. My second run was cut a little short because the power started to drop a bit showing the packs were getting empty but it suddenly stopped. No power at all to the ESC or steering servo. We came back in the house to warm our fingers and inspect the batteries that failed. One of the batteries had no voltage at all so I opened the shrink wrap to investigate. There was a part on the circuit board that poofed. It looked like a thin piece of copper and I suspect that it acts like a fuse. I found a similar piece of copper and soldered it in the same spot and the pack now had voltage. Replaced the shrink and problem solved.
Now before someone reads this and starts saying things like ''Turnigys will always fail like that'' and ''you get what you paid for''.

Let me tell you this. I was geared for 39 mph on 4S. I went to 3S lifepo4 in series which gives a little more voltage than 5S lipo in parallel and put these huge and heavy 40 series Mashers without changing my gearing. I'm surprised the batteries didn't get more damage than they did. As a matter of fact, once I did the repair, I recharged the packs and all the cells were matched and both packs peaked at close to 4700 mah. These are labeled as 4500 mah. They are getting better with use. Turnigy lifepo4, tough as nails I tell ya.

	(#490)
mistercrash Guelph, Canada, eh! Offline Posts: 1,083 Join Date: Sep 2007 Location: Guelph, Ontario, Canada	01.23.2010, 08:10 PM My son has been a very good boy at school lately so I thought it was finally time for him to have his new GERBE. The weather was nice today with temperature at 31 degrees Fahrenheit. Here's a small movie of the big unveiling. It's short and boring So there were two waterproof ERBEs running in the snow today, we went through two sets of lifepo4 packs each until the truck came to a slow crawl. The water proofness proved to be excellent again on both ERBEs. My second run was cut a little short because the power started to drop a bit showing the packs were getting empty but it suddenly stopped. No power at all to the ESC or steering servo. We came back in the house to warm our fingers and inspect the batteries that failed. One of the batteries had no voltage at all so I opened the shrink wrap to investigate. There was a part on the circuit board that poofed. It looked like a thin piece of copper and I suspect that it acts like a fuse. I found a similar piece of copper and soldered it in the same spot and the pack now had voltage. Replaced the shrink and problem solved. Now before someone reads this and starts saying things like ''Turnigys will always fail like that'' and ''you get what you paid for''. Let me tell you this. I was geared for 39 mph on 4S. I went to 3S lifepo4 in series which gives a little more voltage than 5S lipo in parallel and put these huge and heavy 40 series Mashers without changing my gearing. I'm surprised the batteries didn't get more damage than they did. As a matter of fact, once I did the repair, I recharged the packs and all the cells were matched and both packs peaked at close to 4700 mah. These are labeled as 4500 mah. They are getting better with use. Turnigy lifepo4, tough as nails I tell ya. No brain, no headaches.