Updated for 2025:
Streamlight Stinger owners continue to ask whether the Streamlight 75175 (Ni-Cd) and Streamlight 75375 (NiMH) batteries are interchangeable. The short answer is yes — they are 100% compatible. The 75375 is Streamlight’s modern replacement for the older 75175, offering better capacity, longer runtimes, and updated chemistry.

This 2025 guide breaks down the real differences, performance updates, and which battery is the better buy today.

Streamlight NiMH 75375 vs. Streamlight Ni-Cd 75175: Comparison Table

Quick Take:

• Both 75175 and 75375 fit the same Stinger flashlights
• 75375 = modern NiMH upgrade
• 75175 = discontinued Ni-Cd, shorter runtime
• Verdict: 75375 is the better long-term replacement in 2025

The 75175 and 75375 batteries share the same physical size and voltage, which is why they can be swapped without any modification. However, their chemistry and performance characteristics differ significantly. Below is an updated 2025 comparison table showing capacity, chemistry, and real-world performance.

Streamlight Battery 75175 vs. 75375: The Similarities (2025 Update)

Same Voltage — 3.6V

Both batteries output 3.6 volts, which is essential for Stinger flashlights. This is the primary reason they remain interchangeable.

Same Size — Sub-C Cells

Both the Ni-Cd (75175) and NiMH (75375) use Sub-C battery cells arranged in identical packs. They slide directly into any compatible Stinger light.

Compatible With The Same Models

All flashlights originally designed for the 75175 can safely run the newer 75375.

Streamlight Battery 75175 vs. 75375: The Differences (2025 Update)

There would be little point in replacing one battery with another unless there are some differences between the two Streamlight batteries.

Capacity

The capacity of a battery determines the amount of power it can produce from a single charge. The capacity can be used in different ways, such as providing higher burst power.

The 75375 provides 20–25% longer runtime, making it the superior choice for duty use.

• 75175 – 1800mAh
• 75375 – 2200mAh

See Streamlight 75375 Battery Stick here:

Chemistry

75175: Nickel-Cadmium (Ni-Cd)

75375: Nickel-Metal Hydride (NiMH)

NiMH technology offers:
✔ Higher capacity
✔ Longer runtimes
✔ Better environmental safety
✔ Less memory effect

Ni-Cd batteries are now being phased out due to regulations and reduced manufacturing.

See Streamlight 75375 Battery Stick, and Synergy Streamlight 75175 here:

Price & Feedback from users

The only downside to NiMH batteries is that they cost more than their NiCad equivalents. The upside is that you get more power and longer charging for the extra money. 

Regardless of the price difference, NiCad batteries are slowly disappearing and being replaced by NiMH alternatives. Suppose you prefer to buy the cheaper NiCad.

In that case, one alternative to the discontinued Streamlight 75175 is the Synergy FLB-NCD-1, which is around $6 more affordable than the Streamlight 75375.

If you prefer to spend a little more, use a more technologically advanced battery, and gain more power, opt for the Streamlight 75375.

Buy Streamlight 75375 Battery Stick here:

Below are reviews from forum users about their experience in using Streamlight batteries:

Supported Devices

Both the 75175 and 75375 are compatible with:

• Stinger DS LED HL
• Stinger LED HL
• Stinger HP LED
• UltraStinger
• PolyStinger LED
• Stinger DS HPL
• Stinger HL

Any flashlight that originally shipped with a 75175 can safely use a 75375 in 2025.

Are They Interchangeable in 2025? (Yes — 100%)

The 75375 is Streamlight’s official replacement for the 75175. They share:

• The same voltage
• The same size
• The same fitment
• The same charging requirements

The only real difference is improved performance with the NiMH version.

Recommendations

If your 75175 battery still works, you can continue using it.
But when it comes time to replace it, the 75375 NiMH is the best long-term choice due to:

✔ Higher capacity
✔ Longer lifespan
✔ Better environmental footprint
✔ Direct drop-in replacement

Streamlight 75375 battery stick

Buy the OEM Streamlight 75375 NiMH replacement battery. It is more expensive, but uses newer technology, provides more power, and longer life between charging. The downside to this battery is that it is more costly than it replaces.

Synergy Streamlight 75175

You can still buy 75175 standard batteries from third-party suppliers. Batteries from third parties are usually cheaper than OEM. The NiCad type batteries are less expensive than the NiMH type.

The downside is that they don’t last as long, and the quality may not match the OEM battery. When buying third-party batteries, try to buy from a recognized brand name.

FAQ

Can I use the same charger for 75375 as for the 75175?

Yes. Both batteries charge identically using Streamlight’s existing chargers. No changes or adapter plates are needed.

Are third-party 75375 replacements good?

Some are good, but quality varies dramatically. Cheap, unbranded NiMH packs often have inflated mAh claims. Stick with reputable brands or OEM Streamlight.

Is the 75175 discontinued?

Yes. Streamlight has phased out Ni-Cd packs in favor of NiMH. However, you can still find old stock or third-party options.

Which battery lasts longer between charges?

The 75375 lasts ~20–25% longer thanks to its higher capacity and more efficient chemistry.