Home › Cheapest right now › Power Stations & Solar
· 15 in stock · prices checked Oct 17, 2026, 6:34 AM ET
Cheapest 18650 and 21700 rechargeable batteries
The cells most good flashlights and headlamps run on. Sorted by price per 1,000 mAh where the name gives capacity, then by price.
The ranking lowest cost per 1,000 mAh first
Brand-store buttons go straight to the brand's own page, with no affiliate tag. Rankings are pure math.
| Rank | Product | $ / 1,000 mAh | Capacity (product name) | Price today | vs. last week |
|---|---|---|---|---|---|
| #1 | Nitecore NL2150 5000mAh Rechargeable 21700 Battery - Used Nitecore Store In stock | $3.51 | 5,000 mAh | $17.56 | history building |
| #2 | Nitecore NL1823 (NL183) 2300mAh Rechargeable 18650 Battery Nitecore Store In stock | $4.33 | 2,300 mAh | $9.95 | history building |
| #3 | Nitecore NL2150 5000mAh Rechargeable 21700 Battery Nitecore Store In stock | $4.39 | 5,000 mAh | $21.95 | history building |
| #4 | Nitecore NL2160HP 6000mAh Rechargeable 21700 Battery Nitecore Store In stock | $4.49 | 6,000 mAh | $26.95 | history building |
| #5 | Nitecore NL2155HP 5500mAh Rechargeable 21700 Battery Nitecore Store In stock | $4.54 | 5,500 mAh | $24.95 | history building |
| #6 | Nitecore NL2150RX 5000mAh USB-C Rechargeable 21700 Battery Nitecore Store In stock | $4.59 | 5,000 mAh | $22.95 | history building |
| #7 | Nitecore NL2155HPi 5500mAh Rechargeable 21700 Battery for i Series (P20iX, P23i, SRT7i, and More) Nitecore Store In stock | $4.90 | 5,500 mAh | $26.95 | history building |
| #8 | Nitecore NL1834 3400mAh Rechargeable 18650 Battery Nitecore Store In stock | $5.57 | 3,400 mAh | $18.95 | history building |
| #9 | Nitecore NL2150HPR 5000mAh USB-C Rechargeable 21700 Battery, High Performance Nitecore Store In stock | $5.79 | 5,000 mAh | $28.95 | history building |
| #10 | Nitecore NL1840HP 4000mAh Rechargeable 18650 Battery Nitecore Store In stock | $5.99 | 4,000 mAh | $23.95 | history building |
| #11 | Nitecore NL1840R 4000mAh USB-C Rechargeable 18650 Battery Nitecore Store In stock | $6.24 | 4,000 mAh | $24.95 | history building |
| #12 | Nitecore NL1836HP 3600mAh Rechargeable 18650 Battery Nitecore Store In stock | $6.38 | 3,600 mAh | $22.95 | history building |
| #13 | Nitecore NL1840AW 4000mAh All-Weather Rechargeable 18650 Battery Nitecore Store In stock | $7.49 | 4,000 mAh | $29.95 | history building |
| #14 | Nitecore IMR 3100mAh 2 Pack 35A Flat Top 18650 Batteries for Vaping Devices Nitecore Store In stock | $12.89 | 3,100 mAh | $39.95 | history building |
| #15 | Nitecore NL1835LTHP Cold Weather Low Temperature High Performance 18650 Battery Nitecore Store In stock | not stated | – | $29.95 | history building |
Price history started Oct 17, 2026; week-over-week changes appear as it builds. Prices checked Oct 17, 2026, 6:34 AM ET at each brand's own store. Tax and shipping not included.
Specs marked "product name" are read from the brand's own product title. Products sold in several sizes at different prices are left out of per-unit math so the spec matches the price.
Sold out today (6)
- Nitecore Store Nitecore NL2153 5300mAh Rechargeable 21700 Battery, last price $22.95
- Nitecore Store Nitecore NL1826R 2600mAh USB-C Rechargeable 18650 Battery, last price $11.95
- Nitecore Store Nitecore NL1836R 3600mAh USB-C Rechargeable 18650 Battery, last price $21.95
- Nitecore Store Nitecore HC60 v2 1200 Lumen USB-C Rechargeable Headlamp with 3400mAh 18650 Rechargable Battery (Cool White or Neutral White), last price $64.95
- Nitecore Store Nitecore NL2142LTP Cold Weather Low Temperature 21700 Battery - Used, last price $20.76
- Nitecore Store Nitecore NL2142LTP Cold Weather Low Temperature 21700 Battery, last price $25.95
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.
More power stations & solar rankings
Questions people ask
What is the cheapest 18650 and 21700 rechargeable batteries right now?
At today's prices: Nitecore Store Nitecore NL2150 5000mAh Rechargeable 21700 Battery - Used at $3.51 per 1,000 mAh ($17.56). 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 Oct 17, 2026, 6:34 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.