SANYO NCR20700B 4000MAH 15A 20700 (1pc)
The Sanyo NCR 20700B is a new 20700 sized battery. It's a little bigger than an 18650 but packs a lot of energy. The NCR20700B is the more energy density oriented version at a huge 4000-4250mAh while still supporting 15A continuous discharge.
Max Continuous Discharge Current: 15A
Typical Capacity: 4250mAh
Rated Capacity: 4000mAh
Style: Flat top
Max Dimensions: 70.3mm (L) x 20.35mm (D)
Max Weight: 63g
Nominal Voltage: 3.6V
Full Charge Voltage: 4.2V
Battery Safety Basics
Do not overcharge or over-discharge.
To combat this, do not leave your batteries in any charger without supervision. Make sure that you are able to see or check on the charger every 15-30 minutes. This way when the charger indicates that the batteries have been fully charged, you can remove them from the charger. Leaving batteries in a charger all night long or longer can cause them to be overcharged, which can result in battery failure. Charging your battery over 4.25 volts can shorten its life-cycle and going over 4.5 volts can cause it to burst. Cease using your charger if this ever happens.
Recharge batteries with a resting voltage below 3.6V as soon as possible.
Leaving Lion batteries in a discharged state will incur irreversible damage – creating a loss in capacity and a loss in cycles.
Do not let your batteries touch each other or other metallic items.
Keeping your batteries loose, such as in your pockets, is a good way to have your batteries fail and seriously harm you. There are battery holders and covers to keep your batteries safe. Get some – now.
Do not dispose any battery in a fire.
This is just common sense people. There are dangerous chemicals in batteries. If you try to burn your batteries they’ll release dangerous fumes and will probably explode. Do yourself, and the rest of the world, a favor by taking your old batteries to a battery recycling center.