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  1. R

    Luna ga 14 ah shark pack

    Interesting, I missed that part of the instructions. I'll have to experiment a bit to see how far the voltage has to sag before the charge is resumed.
  2. R

    Luna ga 14 ah shark pack

    The Satiator shuts off when the "complete amps" are reached. The charger outputs the set amps until the set voltage is reached, then reduces the output to hold the set voltage. It then shuts off the charger when the complete amps are reached. The default is .15 amps. If you want to hold the...
  3. R

    Luna ga 14 ah shark pack

    Do you know what the manufacturers specified test conditions are, such as at what current? I've not seen that spelled out anywhere. Could it be that hitting the pack hard when nearly discharged could explain the LVC? When my 48v pack is approaching 41v or so I feather the throttle to keep the...
  4. R

    Luna ga 14 ah shark pack

    The box that the GA's came in from Panasonic states "3450 mAh" so some inconsistency there. It also states a charge rate of 1/10 C so maybe that's part of it? It is normal for batteries to increase IR as they discharge (I seem to remember learning about that as an EE major back when Nixon was...
  5. R

    Luna ga 14 ah shark pack

    Wow, seems like there's a lot more going on here than a 1.5% de rating! Actually if you want to be perfectly accurate the GA's are rated 3.45 for a total of 13.8 for a 4p pack. The OP was talking about significant missing capacity maybe 15%-20%? If it was 1.5% either way the thread would not...
  6. R

    Luna ga 14 ah shark pack

    I have seen tests of the GA and PF cells posted on flashlight sites that show the cells delivering energy much closer to the rating even at high discharge rates. Either they had ringer cells or maybe something else is different about how we test. When I raced 1/10 oval pan cars on a banked...
  7. R

    Luna ga 14 ah shark pack

    Mine is a 48v pack and it has never hit LVC. On the longest ride I took so far the bike used 11.5 AH and the battery was getting soft, dropping below 40v at 6 amps or so. Still had a little left. At that point it's probably time to quit unless you really have to keep going. Here are some...
  8. R

    Luna ga 14 ah shark pack

    So, they rate the 2.5 at 2.45, the 2.2 at 2.1, the 2.9 at 2.85, and the 3.2 at 3.15. That meant the 12.8 AH pack became a 12.6 AH pack. When I bought the GA pack from Luna it was advertised as 13.5 on the website at the time, so the 3.45 cells were discounted to 3.375. Seems like Luna and...
  9. R

    Luna ga 14 ah shark pack

    Out of curiosity I googled ebike battery pack and looked at a number of sites. Other than Luna only two (em3ev and lectric cycle) provided information on what type of cells were used and only em3ev specified configuration, all the others just stated the voltage and AH's. Both also rated the...
  10. R

    Luna ga 14 ah shark pack

    The CA2 is an accurate device to see exactly what's going on with your system, at least Mr. Fluke says so. Agreed that 46v cutoff on a 52v pack is too soon. My 48v carbon shark will go below 40, don't know how much further because I ease up at that point. I deliberately chose a 48v pack as I'd...
  11. R

    Luna ga 14 ah shark pack

    A couple of observations... Battery capacity should be measured on the discharge side. If only measuring the charge side the measurement should be discounted 5-10%. I do think the GA cells are a good match for the BBSHD. My pack barely gets warm when pushed and after a normal ride is very...
  12. R

    Luna ga 14 ah shark pack

    I also have a 14AH battery also that's a month old, bought along with a BBSHD kit. My 14AH battery has a usable capacity of 11.5AH measured by a CA2, and takes about 12.5AH to fully charge with a Satiator. Note batteries will always absorb more charge than they release as some is wasted as...
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