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  1. sophia.unitpackpower

    Replace Cells?

    yes, you should replace those low voltage cells, the first step to do a battery pack is cell sorting, to make sure cell consistency. voltage difference should be less than 5mv. because faulty cell lowers overall voltage, causing early cut-off Weakest cell is stressed most; stack deteriorates...
  2. sophia.unitpackpower

    How a Lunacycle / Hailong battery fares after 2 years..

    Tom, we are using both, pure nickel is harder to welding, and cost more. If using pure nickel, several dollars extra cost on each battery
  3. sophia.unitpackpower

    How a Lunacycle / Hailong battery fares after 2 years..

    Thanks for your advice dear, if get customer here, it is my luck, if no customer here, at least I can learn those thing, when other customer meet those problem. I can use what I learn from ES.
  4. sophia.unitpackpower

    How a Lunacycle / Hailong battery fares after 2 years..

    Hi, neptronix, the battery picture I took from our workshop, next door to our office. Some claim that upp is not the supplier, probably bought battery not direct from UPP, since we provide products to many other retailer. Of course you can choose other better supplier than us, that is your rights.
  5. sophia.unitpackpower

    How a Lunacycle / Hailong battery fares after 2 years..

    Thanks, there is a lot of tech info, a sales person should learn more tech knowledge and it is good to get more feedback about UPP, that is how we get better.
  6. sophia.unitpackpower

    How a Lunacycle / Hailong battery fares after 2 years..

    Hi, tomjasz, I took those pictures in our factory, it is hailong type, maybe what you got are not hailong? We have Germany and USA after sale center,sometimes if customer agree, we will ask customer to do some brief test to help us find where the problem is. Yes, we might not be good enough...
  7. sophia.unitpackpower

    How a Lunacycle / Hailong battery fares after 2 years..

    As I know, our company does not have cooperation with lunacycle. I believe lunacyle is a great supplier trusted by many consumers. Many manufactures use cell holder on hailong battery, but if the capacity go up to like 52V 17.5ah, they can not use cell holder, because limited space. Before in my...
  8. sophia.unitpackpower

    How a Lunacycle / Hailong battery fares after 2 years..

    Sorry the photo is a little too big
  9. sophia.unitpackpower

    How a Lunacycle / Hailong battery fares after 2 years..

  10. sophia.unitpackpower

    How a Lunacycle / Hailong battery fares after 2 years..

    Thanks tom. I am new here.
  11. sophia.unitpackpower

    How a Lunacycle / Hailong battery fares after 2 years..

    Hi,I am a salesperson from UPP. Our hailong battery inside is not like that. How to post a picture?
  12. sophia.unitpackpower

    Need a plastic case for battery pack

    good job
  13. sophia.unitpackpower

    Battery storage for Radrover

    the battery has a on/off switch, turn it off before storage. Keep it 50% capacity better than 75%. How to maintain the battery? The battery should be stored in clean, dry, ventilated, dark environment. When unused, keep it after half charge, recharge it every 3 months or 6 months. How to...
  14. sophia.unitpackpower

    What kind of Chargers can I use ?

    use charger dedicated for li ion battery, and the amp should be ok for the charge port, better use 2 amp charger. Because more amp might make the charge port melt.
  15. sophia.unitpackpower

    36V Bafang system battery to the Bosch system

    bafang battery can not work on Bosch
  16. sophia.unitpackpower

    Help with China battery pack

    I think it is for charger, but better ask the vendor
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