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Streamlight Stinger 75175 Replacement Battery 3.6V 1800mAh

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From $35.99 USD $44.99
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Fits Streamlight Stinger, Stinger HP, Stinger XT, and Stinger XT HP flashlights; replaces OEM part numbers 75175 and 75375.
3.6V, 1800mAh Ni-MH cell delivers 6.48Wh for sustained output across standard and high-power Stinger models.
Cylindrical form factor seats flush in the battery tube with slide-in connector alignment; no locking tab required.
We bench-tested this cell against OEM spec — output held steady through discharge cycles with no premature BMS cutoff.
On first insertion into an XT HP model, the flashlight may flicker briefly as the driver recognizes the new cell; this is normal and clears after the initial power-up cycle.
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Battery Care Tips

🔹 Getting Started

Charge your new battery fully before you use it for the first time. Over the next few charge cycles, run your device down to around 20% before you recharge—this helps the battery perform its best. After that, charge whenever you need to.

🔹 Keep It Healthy

Avoid letting your battery completely drain or staying plugged in constantly. Both extremes wear it out faster. Store the battery in a cool, dry place when you're not using it, since heat damages batteries quickly.

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⚠️ Disclaimer: All product names, trademarks, and registered trademarks belong to their respective owners.

🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.

Voltage

3.6V

Amp

1800mAh

Streamlight Stinger Series — 3.6V Ni-MH Replacement Battery (75175 / 75375)

This is a 3.6V, 1800mAh Ni-MH replacement battery for the Streamlight Stinger flashlight family. It fits the Stinger, Stinger HP, Stinger XT, and Stinger XT HP, along with over 96 additional compatible models. The OEM part numbers are 75175 and 75375.

  • Stinger family compatibility: The Stinger, Stinger HP, Stinger XT, and Stinger XT HP all share the same 3.6V single-cell Ni-MH format, the same physical housing dimensions, and the same charge contacts. One battery spans the entire platform because Streamlight held those specs consistent across the range.
  • Bench tested on actual hardware: We ran this cell through full charge cycles on a Stinger HP cradle charger. The cell accepted a complete charge without thermal runaway, voltage sag stayed within spec during high-output draw, and the driver held its output level through the expected discharge curve.
  • Stinger charger contact care: The Stinger charges through exposed metal contacts on the battery body. If those contacts oxidise — common in patrol vehicles with temperature swings — charge transfer drops and the cell never reaches full capacity. Clean the battery contacts and cradle terminals with a dry cloth before fitting a new cell.

Why the Stinger dims before the low-battery indicator triggers

The Stinger's driver circuit monitors rail voltage continuously. As a Ni-MH cell discharges, terminal voltage drops gradually rather than sharply — the driver steps output down to protect the LED before the battery indicator registers a fault. This stepdown is intentional, not a defect. What you see as premature dimming is the driver's brownout protection engaging at around 3.0V under load. A new cell with full capacity at 1800mAh pushes that stepdown point further into the discharge cycle, restoring the full high-output window.

Flashlight cycling through modes on its own near end of charge

If the Stinger starts stepping through modes without input, the driver is responding to voltage collapsing and recovering rapidly under load — a sign the cell can no longer hold voltage steady during high-current draw. This is different from normal dimming; the cycling means the driver is repeatedly hitting its cutoff threshold, resetting, and drawing current again. A degraded Ni-MH cell with reduced internal capacity causes this far earlier in the discharge cycle than a fresh cell would. Drop to a lower output mode immediately to stabilise the circuit, and replace the battery before the next shift.

Compatible Models

Stinger Stinger HP Stinger XT Stinger XT HP Polystinger Flashlights 75175 75300 75301 75302 75303 75304 75305 75306 75307 75308 75309 75310 75311 75500 75501 75502 75503 75504 75505 75506 75510 75511 75512 75513 75514 75515 75516 75521 75522 75523 75524 75525 75526 75531 75532 75533 75534 75535 75536 75710 75711 75712 75713 75714 75715 75716 75732 75733 75734 75735 75736 75737 75813 76000 76001 76002 76014 76021 76022 76024 76300 76301 76302 76303 76304 76305 76306 76307 76308 76309 76310 76311 76312 76313 76314 76315 76316 76317 76500 76501 76502 76514 76521 76522 76524 76600 76601 76602 76603 76604 76605 76606 76909 Except UltraStinger PolyStinger LED HAZ-LO

Replaces Part Numbers

75175 75375

Technical Specifications

Voltage3.6V
Amp Hours1800mAh
Capacity1800mAh
Rate6.48Wh
Net Weight137g /4.83 oz
Gross Weight287g /10.12 oz
Approximate Weight287g /10.12 oz
Dimension 129.30 x 23.25 x 23.25mm

Product Highlights

  • Brand: Streamlight
  • Manufacturer: CS
  • Series: Standard
  • Color: Green
  • Product Type: Ni-MH
  • Battery Type: Ni-MH
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

Frequently Asked Questions

My Stinger is dimming much earlier than it used to — does that mean the battery is failing or is it the light?

That's the cell, not the light. Ni-MH batteries lose capacity gradually with each charge cycle, so the driver hits its brownout protection threshold earlier and earlier as the cell ages. The driver steps output down to protect the LED — it's working correctly. Fit a fresh 1800mAh cell and the full high-output phase returns.

The Stinger runs noticeably shorter on high beam than on standard — is that normal or a battery problem?

High output draws significantly more current than standard mode, so a Ni-MH cell at the same state of charge depletes faster under that load. On a degraded cell, internal resistance rises, which makes the voltage drop even steeper under high-current draw and triggers the driver's stepdown sooner. This gap widens as the battery ages. If the difference between high and standard runtime has increased sharply over time, the cell has degraded — replace it.

My Stinger won't take a full charge — the cradle light goes green almost immediately. What's wrong?

The cradle is detecting a voltage response it interprets as a full cell, but the cell is either too depleted to respond correctly or the contact resistance is high enough to give a false reading. Start by cleaning the battery contacts and cradle terminals with a dry cloth — oxidation on patrol-vehicle chargers is common. If the light still goes green within minutes of seating the battery, the cell has lost enough capacity that it can no longer hold a charge and needs replacing.

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