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Old 06-17-2008, 02:46 PM   #1
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Default Lipo question

Im new the the lipo era and was wanering if its safe to run a lipo battery with any esc. Wanted to make sure I didnt need some special product to use a lipo battery with say an lrp 7.1 esc or a novak sport esc that comes in the losi rtr trucks. thanks.
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Old 06-17-2008, 02:51 PM   #2
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You should be fine. A 7.4v lipo will only be 8.4v when charged, whereas a 7.2v nimh will be around 9v. The only thing you have to worry about is the current limit of the speedo. Just stay within recommended motors and you should be fine.
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Old 06-17-2008, 04:18 PM   #3
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The only issue is low voltage cutoff. Lipos can't be ran down all the way or they won't charge back up again. Most newer speedos have a low voltage cut off setting, check your manual. Or perhaps others here can comment on the speedos you mentioned. Usually around 3 volts per cell, or 6 volts for a typical pack.

Alternatives: Some, such as Novak, make an add on product that will shut down the speedo. Or, just be careful with your run time, run a timer and limit how far you discharge. If the car seems to slow at all, stop immediately. Go pick it up and unplug it, don't even drive it back.
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Old 06-18-2008, 04:37 AM   #4
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All good advice
Lipo's are fickle things they do no not like to run down at all,,yup 3v-3.4 to be safe...

If you see any ,,ANY, drop off in performance stop immediately and recharge, lipo cutoff is a must saving many batts,,,,other wise you will deplete its life. it will puff up probably and soon die ,becoming unsafe to charge in the meantime......I should listen to my own advice Ive killed plenty $$$
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Old 06-18-2008, 05:18 PM   #5
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The LRP 7.1 is too old to have lipo cut off. I would look into getting the add-on monitor as mentioned earlier.
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Old 06-18-2008, 07:38 PM   #6
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Quote:
Originally Posted by Dave H View Post
The only issue is low voltage cutoff. Lipos can't be ran down all the way or they won't charge back up again. Most newer speedos have a low voltage cut off setting, check your manual. Or perhaps others here can comment on the speedos you mentioned. Usually around 3 volts per cell, or 6 volts for a typical pack.

Alternatives: Some, such as Novak, make an add on product that will shut down the speedo. Or, just be careful with your run time, run a timer and limit how far you discharge. If the car seems to slow at all, stop immediately. Go pick it up and unplug it, don't even drive it back.
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