Cheapest battery chargers for 18650, 21700 and AA cells

A smart charger turns a drawer of rechargeable cells into reliable light and radio power for years. Every in-stock charger for flashlight cells (18650, 21700, CR123A, AA and AAA) we track, lowest price first. Check the slot count and supported cell sizes in each product name. Cells themselves: 18650 and 21700 batteries.

#1 today$7.99Nitecore Store

In stock132 brands

Price range$7.99to $51.95

Median price$24.95in stock today

The ranking lowest price first

Every store link here is a paid link. Fenix Store buy buttons go to the store through its affiliate program. For the other brands we have no affiliate program yet, so instead of a buy button there's a "Compare on Amazon" search link; prices shown are the brand stores' own, and Amazon's may differ. Rankings are pure math.

Rank	Product	Price today	vs. last week
#1	Nitecore UI1 USB-C Charger, for 18650, 21700, 18350, 20700 etc Batteries Nitecore Store In stock	$7.99	no change
#2	Nitecore UI2 Dual-Slot USB-C Charger, for 18650, 21700, 18350, 20700 Batteries Nitecore Store In stock	$12.99	no change
#3	Fenix ARE-X1 V2.0 Smart Battery Charger Fenix Store In stock	$13.95	no change
#4	Nitecore i2 Intellicharger Two-Channel Charger - for 18650 etc Nitecore Store In stock	$16.95	no change
#5	Fenix ARE-D1 Single Channel Smart Battery Charger Fenix Store In stock	$16.95	no change
#6	Nitecore Ci2 Dual Slot Universal Battery Charger Nitecore Store In stock	$19.95	no change
#7	Nitecore D2 Digicharger Universal Charger 18650 RCR123A 17650 17670 14500 AA AAA Nitecore Store In stock	$24.95	no change
#8	Fenix ARE-A2 Dual Channel Battery Smart Charger Fenix Store In stock	$26.95	no change
#9	Nitecore UMS2 Dual-Slot USB-C Fast Charger, for 18650, 21700 batteries Nitecore Store In stock	$28.95	no change
#10	Fenix ARE-D2 Dual Channel Smart Battery Charger Fenix Store In stock	$28.95	no change
#11	Nitecore UMS4 USB Four-Slot USB-C Fast Charger, for 18650, 21700 Batteries Nitecore Store In stock	$38.95	no change
#12	Fenix ARE-A4 Multifunctional Battery Charger Fenix Store In stock	$43.95	no change
#13	Nitecore SC4 4-Slot Fast Universal Charger for 18650 17650 17670, RCR123A 16340 14500 AA AAA C D Nitecore Store In stock	$51.95	no change

We have 16 days of price history (since Oct 17, 2026). Prices checked Nov 2, 2026, 6:07 AM ET at each brand's own store. Tax and shipping not included.

Sold out today (3)

Fenix Lighting Fenix ARE-X2 Battery Charger - DISCONTINUED, last price $17.95
Nitecore Store NiteCore New i4 4 Channel Universal Charger, for 18650, 16340 etc, last price $26.50
Nitecore Store Nitecore D4 Digicharger Universal Charger 18650 RCR123A 17650 17670 14500 AA AAA, last price $39.95

Prepared, not scared

Cheapest isn't always best: check what each product includes on the brand page, and buy for the household you actually have. The Kit Calculator works out how much food and water that is.

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Questions people ask

What is the cheapest battery chargers for flashlight cells right now?

At today's prices: Nitecore Store Nitecore UI1 USB-C Charger, for 18650, 21700, 18350, 20700 etc Batteries at $7.99. This page updates every day.

How often is this ranking updated?

Daily. We check each brand store once a day and rebuild this page; the last check was Nov 2, 2026, 6:07 AM ET.

Why isn't my favorite brand listed?

We only collect prices from stores whose terms allow automated price checks. Brands that forbid it, such as EcoFlow, Jackery and Sawyer, are listed on our methods page.