(7 Reviews)

Battery 3.7V 3500mAh – 2-Pk

550

MillerTech 18650 2nd Gen Rechargeable Battery

Power your adventures with the MillerTech 2nd Gen 3500mAh Rechargeable Battery—a high-capacity lithium-ion battery engineered for exceptional runtime and dependable performance. With 1,000+ recharge cycles, it delivers years of reliable power while saving money on disposable batteries. Whether you’re working after dark, hunting, camping, or tackling everyday tasks, this compact powerhouse keeps your light shining when you need it most.

HIGH CAPACITY POWER!

For use with 2nd Generation Headlamps

  • 555 2nd Gen (Double Power)
  • 556 2nd Gen, (Standard & Ladies)
  • 564 (The Quad)
  • 568-LT, (Dutch Bully)
  • 569 (Sportster)
  • 567 Flashlight

Customer Reviews

Patrick Huver
Rating: 5/5
Great Light, Grat Company
Love the design of the Sport. I use it for chores at home and for hiking and camping. Very durable. All the Amish families in my area use Millertech and they use their lights all the time so I thought I'd give it a try. I am very pleased with my Sport Headlamp. My previous headlamp used 4 AAA batteries and the battery contacts became worn and the light would turn off intermittently. I don't foresee this happing with the rechargeable battery and having the ability to charge the battery while it is in the light housing. Brilliant design!
Thu Apr 17 2025 14:20:44 GMT+0000 (Coordinated Universal Time)
Matthew Coldren
Rating: 5/5
2-Pk 18650 (2nd Gen) Battery 3.7v-3500Mah
Tue Dec 24 2024 01:11:49 GMT+0000 (Coordinated Universal Time)
James Miller
Rating: 5/5
2-Pk 18650 (2nd Gen) Battery 3.7v-3500Mah
Sun Nov 24 2024 00:18:00 GMT+0000 (Coordinated Universal Time)
Danny Fry
Rating: 5/5
2-Pk 18650 (2nd Gen) Battery 3.7v-3500Mah
Tue Aug 06 2024 00:31:00 GMT+0000 (Coordinated Universal Time)
Aubrey Sumpter
Rating: 5/5
I've been using these for years just needed some extra
Sat Dec 16 2023 03:28:54 GMT+0000 (Coordinated Universal Time)
DOUGLAS WHITFORD
Rating: 5/5
great deal
Tue Dec 12 2023 00:32:38 GMT+0000 (Coordinated Universal Time)
Ashley Rinehart
Rating: 5/5
2-Pk 18650 (2nd Gen) Battery 3.7v-3500Mah
Sat Nov 04 2023 00:12:02 GMT+0000 (Coordinated Universal Time)

What the pros are saying about MillerTech batteries