2Pack 3.6Ah HPB18 Ni-Mh Replacement Battery for Black and Decker

In this review of the 2Pack 3.6Ah HPB18 Ni-Mh replacement battery, the bottom line is simple: this kit is for Black and Decker 18V owners who want more runtime and a lower-cost spare without changing chargers. The reviewer found the upgraded 3600mAh cells deliver noticeably longer run times and that the packs are fully compatible with original HPB18 chargers and tools, making installation and everyday use trouble free for garden tools, drills, and small cordless appliances.

Key Features

• Upgraded capacity: The 3600mAh Ni-Mh cells increase available runtime so tools run longer between charges compared with older packs.
• Charger compatibility: These packs work with the original HPB18 charger so there is no need to buy a special charging unit.
• Wide tool compatibility: The batteries are designed to fit a broad set of B&D models including Firestorm and FS18 series tools, which simplifies replacements across several devices.
• No memory effect: Ni-Mh chemistry allows charging at any state without long-term capacity loss, making them convenient for intermittent users.
• Three metal pins with temperature sensing: The third pin acts as a temperature sensor to help control charging and protect the cells during charge cycles.

Who It's For

This pack is best for homeowners, DIYers, and landscapers who own Black and Decker 18V tools that accept HPB18-style packs and want a cost-effective spare or replacement that extends run time. It is particularly useful for people who need more power for string trimmers, handheld drills, or other mid-duty cordless tools and prefer batteries that plug into the original charger.

It is less suitable for users who require lithium battery performance, significantly lighter weight, or the absolute longest cycle life; those users should consider factory lithium options. Also, if tool model fit is uncertain, buyers should verify model compatibility before purchasing to avoid fit issues.

Pros & Cons

Pros

• Provides increased runtime thanks to the higher 3600mAh capacity.
• Works with original HPB18 chargers for seamless charging without extra equipment.
• Wide compatibility across many B&D HPB18 and Firestorm series tools makes it a flexible replacement.
• Includes a temperature sensor pin to help manage safe charging.

Cons

• Battery life reports are mixed among users, so longevity versus original packs may vary by use and charging habits.
• Being Ni-Mh, these packs are heavier and have different cycle life characteristics than modern lithium packs.

Specifications

Battery chemistry	Ni-Mh
Capacity	3600mAh (3.6Ah)
Voltage	18V
Compatibility	HPB18, Firestorm and FS18 series B&D tools
Charger	Compatible with original HPB18 charger
Connector	Three metal pins with temperature sensor

Our Verdict

This 2Pack 3.6Ah HPB18 replacement set is a sensible, cost-effective choice for Black and Decker 18V owners who want extra runtime and direct charger compatibility. It delivers good power and broad compatibility at a lower price than many branded replacements, though users seeking lighter weight or lithium performance should look elsewhere.

Frequently Asked Questions

Will these batteries charge in my original HPB18 charger?
Yes, they are designed to be 100% suitable for the original HPB18 charger and use the same charging pins and protocol.

Are these batteries compatible with Firestorm and FS18 series tools?
Yes, the packs list compatibility with Firestorm, FS18HV, FS18ID and several FS18-series B&D models.

Do these Ni-Mh packs have a memory effect?
No, the manufacturer states these Ni-Mh cells do not suffer a memory effect and can be charged or discharged as needed without losing capacity.