Panasonic (Sanyo) NCR18650B / NCR18650G

grabcad

This is a model of a 3,200 mAh (milliamp*hour) lithium Ion Rechargeable 3.7V nominal, 4.2V fully charged 18650 (18mm x 65mm) case size battery. I only recommend Panasonic (Sanyo), LG, and Samsung as they are well known for having accurate and consistent charge capacities (C) in milliamp * hours (mAh). https://blog.evandmore.com/lets-talk-about-the-panasonic-ncr18650b/UPDATE: 2/4/2021 : I just found out that there is a 3,450 mAh version called the NCR18650G version from Panasonic, so if you are looking for a little more capacity, you may want to look for that instead.UPDATE (5/20/2020) : I have charged and stored (40) of these batteries almost exactly 4 years ago to the day and the typical voltage of all were over 4.0 volts and closer to 4.1 volts, which is incredible considering that any battery has a small (but not zero) self-discharge rate. Moreover I have since recharged all with BT-C3400 opus battery charger using the triple charge-discharge mode and have INCREASED the holding capacity of the batteries between 50 to 150 mAh for batteries with capacities of 3,100 ~ 3,200 mAh. These Panasonic batteries are incredibly good in terms of rated capacity, internal resistance, long holding capability (4 years !!) , and for incredible low self-discharge. You definitely get for what you pay for !! See my note below to avoid FAKE Chinese batteries !!**WARNING** : Avoid Ultrafire, Ultralife, Surefire, Trustfire and other Chinese (country of origin) made 18650s as they are *notoriously* known as FAKE ratings and inconsistent capacities !! These are the ones that are typically sold on ebay, amazon, and allibaba. Buyer beware !!https://www.youtube.com/watch?v=qMZuHMlRw_0