Category Archives: Battery Wisdom

Anything battery knowledge related.

Forming a recent NiMH purchase on the Hitec X4 and other computerized chargers.

Ed writes me about properly forming a recent NiMH purchase. Hi Dave, I recently bought one of the FDK Twicell 6.0V 5-cell 2000mah NiMH AA Flat Pack and would like to try it in one of my airplanes . I … Continue reading

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Forming Charge On Peak Charger Email Question

Question: Hi Dave; Firstly- thank you for your quality battery packs. I received my recent purchase- your 1650mah NiMH 8 cell 9.6 tx pack, plugged it in to my tx just to see what it was at, it started at … Continue reading

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Balancing Severely Out of Balance A123 Pack

The following is a recent exchange discussing some charging logic that is impacted often by time-out settings in chargers. Not a bad thing all in all. The same logic can be applied to Lipo packs as well. Hi, Dave: Here’s … Continue reading

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Is Daily Low Self Discharge Rate and Important Factor in RC?

A customer asking about an unusual cell size of ours asks: “Are they are low self discharge?” They are not Eneloops which would be the only NiMH I would classify as Low self discharge. This is almost a silly thing … Continue reading

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Crash Investigation, Why did it crash?

Just as in full scale aviation, crashes are often because of a sequence of things going wrong. I received a letter recently asking my opinion on a set of circumstances. At the time of this writing there is no 100% … Continue reading

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High Cell Count Packs

Sonny P. Writes: What is the proper way to charge a 14 cell A123 battery? Sonny, I take from your question that your concerned about the large cell count and not the rules of charging this particular chemistry of pack. … Continue reading

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Lipo Battery Disposal

Warren Behymer asks and interesting question: I need to know how to dispose of LiPo battery that has swollen due to an overcurrent. There are two issues. 1. We want to discharge the battery in such a way as there … Continue reading

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Converting A Model From Lipo to A123 (LIFE) Cells

Chris from Michigan Asks; Hello Dave, I would like to power my Ryan with A123 cells. I have been using a 9s 4p 6000mah Lipo pack to power a Hacker C50 motor. If I understand things correctly, I believe that … Continue reading

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Checking A123 RX Packs For Recharge Point

A123 RX Packs can be tricky to deturming how much is left in the pack by checking voltage alone. Variations in connectors and length of wire can have a big impact on actual volt readings when loaded. Using an RRC1000 … Continue reading

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Do A123 LIFE Packs Free Us From Cycling?

Dave One more quick question. I ordered some 1100 2s A123 packs from you today. Do these need to be cycled? I have a FMA 4S CellPro charger that is A123 compatible. It will charge and balance, but not cycle. … Continue reading

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