Thanx Pat, I have six batteries and they all show 15.3V after 6weeks! I use a DY3 charger. You say there’s no need for a chrg/disghrg cycle until voltage drop?There’s no need to “cycle” a lipo, they don’t develop memories. There is s requirement to monitor them for correct storage voltage as they self discharge over time.
Depending on the charger used it may be necessary to charge a battery having lower than storage voltage in order to permit charger storage mode programming to function. Some will not automatically increase voltage to achieve storage level as their programming is designed around only discharging a battery. As there are a multitude of chargers on the market using different programming people should experiment with the storage cycle to determine how their charger works. I’d suggest reading the documentation that came with the charger to assist but bear in mind the cheaper the charger the worse the documenting that was provided will be...
- Discharge packs to "7.7-7.4 volts" or to about a 1/2 to 1/3 charge.
- Monitor batteries regularly, ensure battery voltages remain above "7.0 volts".
- Please do not store batteries fully charged, sells may degrade under a full charge if stored for long periods of time.
Although Fromeco was one of the first, and best, RC related companies to introduce lithium ion batteries into the hobby (I know this because I used them for flight and ignition energy sources when they first started selling them) their storage instructions for li-Ion’s were written during the period when the chemistry type was just entering the market.Not to quibble, but one of the largest/longest suppliers of lithium ion packs in the RC world (FROMECO) has this to say about the storage of thier Li-Ion cells
It is significantly beneficial to avoid storing a lithium-ion battery at full charge. A Li-ion battery stored at 40% charge will last many times longer than one stored at 100% charge, particularly at higher temperatures.
Battery storageNo idea on what the camera folks are saying. But everything I've ever seen recommends partially discharged storage. I'll take a look at some camera sources. Make sure I am not lost in the woods.