Durability is fine as long as you take care of it. Make sure if its in a car/truck that it is properly strapped in. You dont want it flying out. Also make sure if you were to crash nothing could pierce it.
So i bought 2 of these and came perfectly balanced even after charging. I noticed in my quad after 14 min flght time on 1.5kg monster that i used 5000 mah and it was at 10.8. I though i killed them then i charged it at set 3s and 5000mah and when fully charged at 5000 it only gets 12.5 volts. Thsi is the same with other battery. I didused that this IS NOT A 5000MAH BATTERY BUT 5600 MAH BATTERY!!!!
Great batteries. I have purchased many of these and they have all balanced, charged, and performed great. These are a great value for the money.
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I bought 8 of these batteries about 3 months ago. when i got them, one battery had a dead cell (which im still trying to get hobby king to replace) since then i have had 2 more batteries have a cell die and 2 more of them that i don't think will last much longer. I am very upset with this product and will never buy another battery from hobby king again. I would not recommend this battery for applications that will draw more then 40-50 amps. Complete waste of my money.
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Bought 3 of these batteries recently. I am more of a Turnigy guy but I needed a 5000 3s and Zippy was in stock. My friend has had bad luck with Zippy's but I thought I would try them out. All of them are balanced and working good!