UltraFire rechargeable batteries for flashlight cells by size

Rechargeable Battery Collection

Spare cells by size for flashlight hosts—start with 18650, 21700, 14500, 16340, 26650, or AA, then match protected vs unprotected and pack count on each product page.
18 products
 
18650 3000mAh 3.7V Rechargeable Batteries (2-Pack) - With Protection Board - UltraFire
18650 3000mAh 3.7V Rechargeable Batteries (2-Pack) - With Protection Board - UltraFire 
4%

UltraFire® Batería Recargable 18650 3000mAh

$25.99
$24.95
3000mAhCapacity
3.7VRated Voltage
9AMax Discharge
VIEW PRODUCT
18650 3000mAh 3.7V Rechargeable Batteries (2-Pack) - UltraFire
18650 3000mAh 3.7V Rechargeable Batteries (2-Pack) - UltraFire 
4%

UltraFire® Batería Recargable 18650 3000mAh

$24.99
$23.99
3000mAhCapacity
3.7VRated Voltage
9AMax Discharge
VIEW PRODUCT
18650 2200mAh 3.7V Rechargeable Batteries (2/4-Pack) - UltraFire
18650 2200mAh 3.7V Rechargeable Batteries (2/4-Pack) - UltraFire 
8%

UltraFire® Batería Recargable 18650 2200mAh

$19.99
$18.39
2200mAhCapacity
3.7VRated Voltage
4.4AMax Discharge
VIEW PRODUCT
UltraFire® 21700 Rechargeable Flattop Battery 1 PCS
UltraFire® 21700 Rechargeable Flattop Battery 1 PCS 
29%

UltraFire® 21700 Rechargeable Flattop Battery

$27.99
$19.99
5000mAhCapacity
3.7VRated Voltage
7AMax Discharge
VIEW PRODUCT
21700 5000mAh 3.7V Rechargeable Batteries (2-Pack) - UltraFire
21700 5000mAh 3.7V Rechargeable Batteries (2-Pack) - UltraFire 
26%

UltraFire® Batería Recargable 21700

$37.99
$27.99
5000mAhCapacity
3.7VRated Voltage
7AMax Discharge
VIEW PRODUCT
18650 3000mAh 3.7V Pro Rechargeable Batteries (2-Pack) - UltraFire
18650 3000mAh 3.7V Pro Rechargeable Batteries (2-Pack) - UltraFire 
0%

UltraFire® Batería Recargable Pro 18650 3000mAh

$27.99
3000mAhCapacity
3.7VRated Voltage
6AMax Discharge
VIEW PRODUCT
18650 2600mAh 3.7V Rechargeable Batteries (2-Pack) - With Protection Board - UltraFire
18650 2600mAh 3.7V Rechargeable Batteries (2-Pack) - With Protection Board - UltraFire 
0%

UltraFire® Batería Recargable 18650 2600mAh

$22.99
2600mAhCapacity
3.7VRated Voltage
ProtectedBuilt-in Protection
5.2AMax Discharge
VIEW PRODUCT
18650 2600mAh 3.7V Rechargeable Batteries (2/4-Pack) - UltraFire
18650 2600mAh 3.7V Rechargeable Batteries (2/4-Pack) - UltraFire 
0%

UltraFire® Batería Recargable 18650 2600mAh

$21.99
2600mAhCapacity
3.7VRated Voltage
5.2AMax Discharge
VIEW PRODUCT
18650 3400mAh 3.7V Rechargeable Micro-USB Battery (2-Pack) - UltraFire
18650 3400mAh 3.7V Rechargeable Micro-USB Battery (2-Pack) - UltraFire 
0%

UltraFire® Batería Recargable 18650 | Cargador Micro-USB

$35.99
3400mAhCapacity
3.7VRated Voltage
6.8AMax Discharge
VIEW PRODUCT
UltraFire® 10440 Battery (Unprotected) 2 PCS
UltraFire® 10440 Battery (Unprotected) 2 PCS 
0%

UltraFire® Batería 10440 Recargable (Sin Protección)

$15.99
350mAhCapacity
3.6VRated Voltage
0.32AMax Discharge
VIEW PRODUCT
10440 500mAh 3.7V Rechargeable Batteries (2/10-Pack) - UltraFire
10440 500mAh 3.7V Rechargeable Batteries (2/10-Pack) - UltraFire 
0%

UltraFire® Batería 10440

$16.71
500mAhCapacity
3.7VRated Voltage
ProtectedBuilt-in Protection
0.32AMax Discharge
VIEW PRODUCT
14500 battery for rechargeable flashlight
14500 battery for rechargeable flashlight 
0%

UltraFire® Batería Recargable 14500 (Paquete de 2)

$17.99
850mAhCapacity
3.7VRated Voltage
1.7AMax Discharge
VIEW PRODUCT
16340 880mAh 3.6V Rechargeable Batteries (2-Pack) - UltraFire
16340 880mAh 3.6V Rechargeable Batteries (2-Pack) - UltraFire 
0%

UltraFire® Batería Recargable 16340

$18.23
880mAhCapacity
3.6VRated Voltage
1AMax Discharge
VIEW PRODUCT
17670 1800mAh 3.7V Rechargeable Batteries (2-Pack) - UltraFire
17670 1800mAh 3.7V Rechargeable Batteries (2-Pack) - UltraFire 
0%

UltraFire® Batería Recargable 17670

$18.23
1800mAhCapacity
3.7VRated Voltage
3.6AMax Discharge
VIEW PRODUCT
18350 1200mAh 3.7V Rechargeable Batteries (2-Pack) - UltraFire
18350 1200mAh 3.7V Rechargeable Batteries (2-Pack) - UltraFire 
0%

UltraFire® Batería Recargable 18350

$18.23
1200mAhCapacity
3.7VRated Voltage
1.8AMax Discharge
VIEW PRODUCT
26650 5000mAh 3.7V Rechargeable Batteries (2-Pack) - UltraFire
26650 5000mAh 3.7V Rechargeable Batteries (2-Pack) - UltraFire 
14%

UltraFire® Batería Recargable 26650

$39.99
$34.55
5000mAhCapacity
3.7VRated Voltage
ProtectedBuilt-in Protection
7.5AMax Discharge
VIEW PRODUCT
18650 1800mAh 3.7V Rechargeable Batteries (2/4-Pack) - UltraFire
18650 1800mAh 3.7V Rechargeable Batteries (2/4-Pack) - UltraFire 
0%

UltraFire® Batería Recargable 18650 1800mAh

$16.99
1800mAhCapacity
3.7VRated Voltage
3AMax Discharge
VIEW PRODUCT
AA 2800mAh 1.5V Alkaline Batteries (2-Pack) - With Protection Board - UltraFire
AA 2800mAh 1.5V Alkaline Batteries (2-Pack) - With Protection Board - UltraFire 
30%

UltraFire® Batería AA Recargable

$19.99
$13.99
2800mAhCapacity
1.5VRated Voltage
VIEW PRODUCT

What gets in the way when you pick a cell

Size fit, protected vs unprotected labeling, and pack count decide the shortlist more than brand names. Tap one to see how to narrow the list.

Find the right cell by size

Which host size do you need—18650, 21700, 14500, 16340, 26650, or AA / compact?

Specs are from this collection. Confirm cell size, protected vs unprotected labeling, capacity, and pack count on each product page. Match the size printed for your light; follow the product page and included instructions for care.

18650 3000mAh protected or 21700 5000mAh?

Two common spares: a protected 18650 3000mAh 2-pack for everyday flashlight hosts vs. a protected 21700 5000mAh 2-pack when the tube is built for the larger cell.

18650 · PROTECTED

UltraFire® 18650 Rechargeable Battery 3000mAh

Choose it when your light lists a removable 18650 and you want a protected 3000mAh 3.7V spare in a 2-pack. Confirm length and button/flat tip needs on the product page before checkout.

Size class18650 listed
Capacity3000mAh listed
Voltage3.7V listed
Circuit noteProtected listed
Pack2 PCS listed
Best for this jobCommon 18650 flashlight spare
View 18650 3000mAh
21700 · PROTECTED

UltraFire® 21700 Rechargeable Battery

Choose it when the host is built for 21700 and you want a protected 5000mAh 3.7V spare in a 2-pack. Do not force a 21700 into an 18650-only tube—confirm the size on your light first.

Size class21700 listed
Capacity5000mAh listed
Voltage3.7V listed
Circuit noteProtected listed
Pack2 PCS listed
Best for this job21700 host spare
View 21700 Battery

Need Pro 18650 with higher listed discharge? See Pro 3000mAh. Prefer USB onboard 18650? See the Micro-USB 3400mAh pack. Looking for flattop 21700? See the 21700 Flattop listing.

Cell sizes explained

Most buyers start with the size stamped on the light or old cell, then choose protected vs unprotected labeling and pack count. Here is what each option in this collection is for.

Size classes in this collection

18650 classSeveral 1800–3000mAh listings (protected, unprotected, Pro, and Micro-USB variants)—confirm tip style and length on the product page
21700 classProtected 5000mAh 2-pack and a separate flattop unprotected 5000mAh listing—match tip style to the host
14500 · 16340 · 2665014500 and 16340 for compact hosts; 26650 for larger tubes that list that size—confirm diameter and length before you order
AA · 10440 · short cellsAA 1.5V 10-pack for household / AA hosts; 10440 for tiny tubes; 18350 / 17670 for short or 2×CR123-length hosts listed on those pages
Match the size printed on the product page to the batteries your light already uses; do not assume every light accepts every size.

Labels and pack choices

Protected vs unprotectedSeveral SKUs list protected or unprotected in the title or description—pick the labeling your host expects and confirm on the product page
Button top vs flattop18650 2200mAh lists Button Top and Flattop variants; 21700 Flattop is a separate SKU—confirm tip style before checkout
Pack countMost Li-ion SKUs list 2 PCS; AA lists 10 PCS; some 18650 / 21700 variants also list 1 or 4 PCS options
Common-sense pairingUse only the cell size listed for your light; keep spare cells dry in storage and follow the product page for care
This page helps you compare cell size, labeling, and pack count only. It is not a charging how-to or a safety procedure manual—use the product page and included instructions.

Rechargeable battery checklist

Tick them off before you add cells to cart. Progress is saved on this device.

0 of 7 done0%
Also shop flashlights by cell
By Battery Model