Best 21700 Battery In October 2024

Here, we’ll review the top 10 Best 21700 Battery on the market today. We’ll provide an overview of the pros and cons of each product. Read on for our selection of Best 21700 Battery.

To help you in your search, we have completed this list of the Best 21700 Battery.

Top Rated Best 21700 Battery Of 2024

Rank	Product Name	Score
1	Fenix are-D1 USB Powered Smart Battery Charger for 21700/18650/16340 with EdisonBright BBX5 Battery Buy Now	9.7 Buy Now
2	Smart Rechargeable Battery Charger for Ni-MH Ni-Cd A AA AAA C SC F6 Buy Now	9.5 Buy Now
3	M&A BD 2 Pack of 50E-Green, 5000mAh, Rechargeable, Replacement for 21700-Battery, for LED Buy Now	9.1 Buy Now
4	M&A BD 2 Pack of 40T-Purple, 4000mAh, 30A, Rechargeable, Replacement for 21700-Battery, Buy Now	8.8 Buy Now
5	Fenix are-A2 Smart Battery Charger for 21700/18650/16340 with EdisonBright BBX5 Battery Carry case Buy Now	8.6 Buy Now
6	M&A BD 2 Pack of 4200mAh, Gray-P42A, 45A, Replacement for 21700-Battery, Rechargeable, Buy Now	8.3 Buy Now
7	NITECORE UMS2 Intelligent USB Dual-Slot Quick Battery Charger for Li-Ion/Ni-MH/Ni-Cd/IMR 16340 14500 18650 Buy Now	8.1 Buy Now
8	NITECORE New i4 battery Charger For Li-ion / IMR / Ni-MH/ Ni-Cd 18650 Buy Now	7.8 Buy Now
9	Universal Smart Battery Charger 4 Bay for Rechargeable Batteries Ni-MH Ni-Cd AA AAA Buy Now	7.5 Buy Now
10	2 Pack of High Drain Authentic 30T, 3000mAh 3.7V 35A, Flat Top, 21mmX70mm Buy Now	7.2 Buy Now

1. Fenix are-D1 USB Powered Smart Battery Charger for 21700/18650/16340 with EdisonBright BBX5 Battery

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9.7/10 our score

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Bundle includes edisonbright bbx5 battery carry case
Batteries not included
Compatible with battery types 2665021700 1865016340 1450010440 aa aaa c
Usb powered battery charger
Single charging bay

2. Smart Rechargeable Battery Charger for Ni-MH Ni-Cd A AA AAA C SC F6

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9.5/10 our score

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What you get: bo4-pro smart charger, power cord, user manual, warranty card, 24 hours warm service, 60 days free refund, 2 years free replacement, lifetime maintenance. warm tips: this charger with no wall adaptor, you can use any dc 5v/2a adapter. (different input currents will affect the actual charging current. it is recommended to charge with 5v2a.)
Ul certification: our product has been tested, got safety certificate and meets the applicable published standard. the ul mark is proof of product compliance to north american safety standards.
Strong practicality: can charge for different types of dc 3.7v cylindrical lithium batteries 10440, 14500, 14650, 16340, 16650, 17650, 17670, 18350, 18490, 18500, 18650, 18700, 22650, 20700, 21700, 22700, 25500, 26650, 26700 and 1.2v nimh/nicd aa, aaa, a, c, sc, f6 rechargeable batteries.
Intelligent charger: has four independent charging channels, it can charge four lithium batteries at the same time. users can choose different charging current to meet the needs of slow charge or fast charge. and the charger will display the status of each rechargeable battery when charging.
Safety assurance: comes with special charge and discharge management circuit. with multiple security protection settings, the charger can effectively prevent reverse, short circuit, overcharge, over discharge, over-current damage to the battery, which makes users using the product without any safety concern.

3. M&A BD 2 Pack of 50E-Green, 5000mAh, Rechargeable, Replacement for 21700-Battery, for LED

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9.1/10 our score

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Capacity: 5000mah & max continuous discharge current: 15a
Style: flat top (no button on top).
Size: 70.80mm (l) x 21.80mm (d)
Package: 2 pack of m&a bd 50e-green batteries & 1 free storage case
Please check the size and style before you place an order.

4. M&A BD 2 Pack of 40T-Purple, 4000mAh, 30A, Rechargeable, Replacement for 21700-Battery,

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8.8/10 our score

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Please check the size and style before you place an order.
Size: 70.30mm (l) x 21.22mm (d)
Style: flat top (no button on top).
Capacity: 4000mah & max continuous discharge current: 30a
Package: 2 pack of 40t-purple replacement batteries.

5. Fenix are-A2 Smart Battery Charger for 21700/18650/16340 with EdisonBright BBX5 Battery Carry case

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8.6/10 our score

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Lcd screen display
Charge 1 or 2 batteries at the same time
Bundle includes edisonbright bbx5 battery carry case
Compatible batteries 10440 14500 16340 18650 21700 26650 ni-mh / nicd: aa, aaa and c
Multiple levels of protection short-circuit protection over-current protection, over-voltage protection, reverse polarity protection,

6. M&A BD 2 Pack of 4200mAh, Gray-P42A, 45A, Replacement for 21700-Battery, Rechargeable,

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8.3/10 our score

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Please check the size and style before you place an order.
Package: 2 pack of p42a batteries.
Style: flat top (no button on top).
Size: 70.30mm (l) x 21.22mm (d)
Capacity: 4200mah & max continuous discharge current: 45a

7. NITECORE UMS2 Intelligent USB Dual-Slot Quick Battery Charger for Li-Ion/Ni-MH/Ni-Cd/IMR 16340 14500

NITECORE UMS2 Intelligent USB Dual-Slot Quick Battery Charger for Li-Ion/Ni-MH/Ni-Cd/IMR 16340 14500 18650

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8.1/10 our score

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Lcd display- reports key realtime information such as battery health, charging status and charging mode.
Fast and efficient charging- reach a maximum total of 4000ma for two slots, 3000ma for one slot when pairing with a 9v qc2.0+ output usb power source. reach a maximum 1000ma charging current per slot when paring with a standard 5v usb source.
Battery types & sizes - compatible with various battery types (li-ion/imr/lifep04/ni-cd/ni-mh) and common battery sizes including (18650, 16340,14500, rechargeable aa, aaa).
Intelligent charging- automatically selects appropriate charging current and voltage to protect the batteries and prolong its lifespan
Qc3.0 charging adapter included - charge your batteries quickly with the included lumentac qc 3.0 charging adapter

8. NITECORE New i4 battery Charger For Li-ion / IMR / Ni-MH/ Ni-Cd 18650

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7.8/10 our score

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Most popular charger in market.
New upgraded version equipped with ac and 12v cords capable of charging 4 batteries of different types simultaneously
Compatible with: li-ion / imr / lifepo4: 26650, 26500, 25500, 22650, 22500, 21700, 20700, 18700, 18650, 18500, 18490, 18350, 17670, 17650, 17500, 17350, 16650, 16340 (rcr123a), 16500, 14650, 14500, 14430, 14350, 13650, 13500, 13450, 12650, 12500, 12340, 10500, 10440, 10350, 10340 , ni-mh / ni-cd: aa, aaa, aaaa, c, d
12v dc cable, 2x edisonbright aa to d battery converter spacers & edisonbright bbx3 battery box included. spacers allow use of rechargeable aa batteries in d battery equipment.
Made from durable abs (fire retardant / flame resistant)

9. Universal Smart Battery Charger 4 Bay for Rechargeable Batteries Ni-MH Ni-Cd AA AAA

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7.5/10 our score

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5. what you get: eastshine s4 universal 4 slots updated 2020 household battery chargers, dc 12v - 24v auto vehicles / ac 100v - 240v us wall adapter, user manual, happy card with 24 hours warm service, 30 days free refund, 2 years free replacement, lifetime maintenance. do not charge a damaged / inferior battery.
1. safety first: s4 4 slot plug in recharger compliant standard--ul cul tuv gs pse fcc ce c-tickcb rohs,and with intelligent circuits, fire retardant materials. please confirm your battery is genuine / not damaged / quality / rechargeable before charging.
2. 4bay universal charger charges simultaneously almost all types rechargeable batteries of multiple different specifications: nimh ni-cad double a triple a aa aaa aaaa c sc nicd, lithium-ion li-fepo4 imr inr icr 26700 26650 26500 25500 22650 18700 18650 18490 18500 18350 17670 17650 17500 17355 16650 16340 rcr123a 14650 14500 14430 10440 18659 20650 18560 liion protect...
3. 4cell speedy charger for: button top eneloop 2000mah aa 2 hour, amazonbasics 800mah aaa 0.8-hour at 1 amp rapid current, flat top 3.7v 3400mah lithium ion panasonic ncr18650b 3.5-hour, 3.6v 2500mah li ion high drain lg he2 2.5-hour @ 1a quick charge current.
4. four pack cells digital lcd display smart charger: automatically detect battery status, select charge mode, cut off at full power or overtime, and lcd screen displays each cells voltage and type, charging current and time independently. 2 charge current (500ma slow/ 1000ma fast) and 3.2v lifepo4 options to be chosed manually.

10. 2 Pack of High Drain Authentic 30T, 3000mAh 3.7V 35A, Flat Top, 21mmX70mm

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7.2/10 our score

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3000mah/3.7v/35a/rechargeable/high drain/flat top
Warning: do not buy cheap chinese knockoff
Size: 70(l)*21mm(d) (+/-0.05mm)(not aa or aaa)
2 authentic 30t, 3000mah. flat top 21700-battery for flashlight etc
Allforbest(tm) z-curve technology applied to verify discharging current and voltage