I have a raw (unprotected) 3.7v LiPo cell. It's rated 4000mAh. It has the markings "HRDC 14.8wh 3.7V 606090P 20170528". Apparently 606090 is a number commonly associated with this type of battery, but I can't find a datasheet. What's a safe discharge rate?

  • \$\begingroup\$ Does “unprotected” mean no current or thermal sensors / control? If it does the 0mA may be sensible.... \$\endgroup\$ – Solar Mike Feb 10 '18 at 22:51
  • \$\begingroup\$ @SolarMike Unprotected means all the protection is based on me keeping a close eye on current and voltage with some meters. :) \$\endgroup\$ – Daffy Feb 10 '18 at 23:01
  • 1
    \$\begingroup\$ Take care with it then . \$\endgroup\$ – Solar Mike Feb 10 '18 at 23:02

I found some data here:


strangely the item listed there is not a 606090, but a smaller 592627 but the C ratio will be the same.

this may not be your exact cell but should be representative.

0.5C continuous, 1C peak


You should use a battery that has a current rating "C" that is rated for your load current. It sounds like you found a battery in a dumpster and are looking for a load for it to drive. If you use it in a Vape'r using a very high current then it might explode in your face or catch on fire.

Some of my RC model airplane Li-PO batteries are rated up to 70C and the weak ones are good for at least 20C.

  • \$\begingroup\$ You're right about the battery being salvaged, but I don't intend to power any heavy loads with it. I'm using it for a load drawing 2 amps max (0.5C). \$\endgroup\$ – Daffy Feb 11 '18 at 1:28

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.