Menu
Cart

Samsung 40T 21700 30A Flat Top 4000mAh Battery - Genuine

Samsung

  • $ 7.25
  • 43 Reviews

SKU: samsung40t

Samsung 40T 21700 - Amazing capacity with high power.

One of the top performing Samsung 21700 size batteries, the Samsung 40T is an amazing battery which performs closely to the Samsung 30T in terms of overall power, while offering a superior 4000mAh of capacity. Free case with your purchase! 

You can view Mooch's testing here.

    We don't sell bogus batteries. When buying from LiionWholesale, you can rest assured that we only work with top tier manufacturers to bring you the best, most reliable, trustworthy batteries that will perform above and beyond your expectations. And we test every shipment to ensure consistent quality.

    Priced per battery, not per pair.

    Samsung 40T Datasheet/Specifications

    Samsung 40T 21700 4000mah Specifications:

    • Size: 21700
    • Approximate Diameter: 21.1mm (max)
    • Approximate Length: 70.4mm (max)
    • Brand: Samsung
    • Manufacturer Rated Capacity: 4000mAh
    • Manufacturer Rated Standard Discharge Capacity: 3900mAh
    • Manufacturer Rated Max Discharge Current: 30A
    • Nominal Voltage: 3.6V
    • Peak Voltage: 4.2V
    • Protected: NO
    • Style: Flat Top
    • Color: Purple
    • Origin: South Korea

    Batteries are sold individually.

    If your battery is damaged or defective on arrival (will not take its first charge, or has issues with its first cycle), please let us know within 14 days of receiving your order and we'll make it right. Please read our complete store policy on defective products here for more information and to see if you're eligible.

    Manufacturer ratings: Please see more information regarding manufacturer ratings here.

    Battery Warning

    Warning: Lithium ion batteries may explode or burn due to improper use. Using these batteries for purposes not intended by the manufacturer, including outside a battery pack and/or without a BMS, may cause severe injury and damage. We are not responsible for any injuries caused by lithium ion batteries - use at your own risk.

    All rechargeable batteries have inherent risks under any circumstance. Use caution with working with li-ion batteries (lithium-ion), LiPo (lithium ion polymer), and any rechargeable cells (together "rechargeable batteries"), as they have dangerous charging characteristics and are known to explode or burn if mishandled. A purchaser and user of rechargeable batteries should educate themselves on rechargeable batteries, especially as to charging, discharging, assembly, and storage. Learn more about proper storage and care for rechargeable batteries here. We are not responsible for any damage caused by the misuse or mishandling of rechargeable batteries.

    Here are a few tips:

    • Never completely discharge batteries (below 2.5V under load or 3V unloaded)
    • Charge fully (to 4.2V) before first use
    • Never charge batteries to 4.3V or above
    • Do not charge unattended
    • Do not store your li-ion batteries fully charged for an extended period of time (weeks or more)
    • If you must store your battery, only store in a case or individual box in a cool and dry place at approximately 3.6-3.7V
    • Use only high quality battery chargers
    • Do not expose to heat
    • Do not connect the positive contact to the negative contact without an appropriate load
    • Never exceed the battery's specifications
    • Never try to charge or discharge li-ion batteries with battery chargers that are not made for li-ion batteries
    • Always charge these batteries on and within fireproof material
    • Never leave rechargeable batteries in a recharging station unattended
    • Do not use any rechargeable battery or charger if any visible damage is present, or if known mishandling, accidental or otherwise, has occurred
    • Always store and transport rechargeable cells in a safe, non-conductive container (never keep a spare battery loose in a pocket, purse, etc. and always use protective cases)
    • Properly dispose of all battery cells and chargers in accordance with local laws and mandates (if you're unsure, contact your local municipality)
    • If a rechargeable battery overheats, hisses, or bulges, immediately quarantine the battery from any combustible materials - ideally, take the battery outside
    • If a rechargeable battery catches fire, the FAA recommends pouring water or soda on the battery and surrounding areas - ideally, use a foam extinguisher to quell the fire

    By purchasing this product, you agree that seller makes no warranties whatsoever with respect to the goods sold on this website, including any (a) warranty of merchantability or (b) warranty of fitness for a particular purpose, whether express or implied by law, course of dealing, course of performance, usage of trade or otherwise. Buyer acknolwledges that it has not relied upon any representation or warranty made by seller, or any other person on the seller's behalf. If purchasing for resale, buyer assumes all responsibility and agrees to forward all notifications and warnings to the purchaser.

    Customer Reviews

    4.9 Based on 43 Reviews
    5 ★
    88% 
    38
    4 ★
    9% 
    4
    3 ★
    2% 
    1
    2 ★
    0% 
    0
    1 ★
    0% 
    0
    Customer Photos
    Write a Review Ask a Question
    • Reviews
    • Questions

    Thank you for submitting a review!

    Your input is very much appreciated. Share it with your friends so they can enjoy it too!

    Filter Reviews:
    • BATTERIES
    • prices
    • performance
    • shipping
    • life
    • vaping
    • battery
    • power
    • Samsung
    • IJOY
    DB
    12/09/2019
    Dylan B.
    United States United States
    • What device/application do you use this with? Flashlights and vape devices

    My favorite battery

    If you are looking for a little bit more power and life from a battery look no further these Samsung 2700 40T 4000 mAh batteries are my favorite batteries. I use them from my flashlights to my mechanical tube mods for cloud competition's.

    TM
    11/20/2019
    Thomas M.
    United States United States
    • What device/application do you use this with? Vaping

    Just ok this time

    I have ordered quite a few batteries from here. This is the first time that the batteries weren’t great. The charge in the 4 new Samsung 21700’s is the same as the 5 month old batteries they are supposed to replace. They work and arrived on time, so that’s why they get 3 stars. I hope this is a isolated problem and not the new normal.

    RC
    11/18/2019
    Robert C.
    United States United States
    • What device/application do you use this with? Vape..

    As advertised.

    Post office delivered on time. No issues.

    MM
    10/31/2019
    Matthew M.
    United States United States

    Samsung 40T

    Great performance!!!!! My favorite 21700, 1 battery will get me through most of the day

    MR
    10/24/2019
    matt r.
    United States United States
    • What device/application do you use this with? Warlock Guardian DNA 250C

    Great batteries

    As always got what I ordered and they work like they should


    We Also Recommend