Welcome to our store. Your trusted source for batteries and power solutions. Learn more

For support or quotes: sales@batteryweb.com
WELCOME5
BatteryWeb

Fluke RBP5 6XG45 Replacement Battery 3.7V 6700mAh

Up to 19% off
New arrival
From $303.99 USD $373.99
Shipping calculated at checkout.
Fits Fluke 6XG45, PLS 180G, 6XG46, and eight other survey instruments; replaces OEM part RBP5.
3.7V, 6700mAh lithium-ion cell delivers full capacity for sustained measurement sessions without mid-field power loss.
Single-pin connector with positive contact alignment; seats flush into instrument battery slot with positive terminal forward.
We bench-tested this cell on a 6XG45 probe initialization cycle — BMS accepted full load draw without threshold cutoff.
After installing, run a full calibration cycle through the instrument menu before field deployment — the 6XG45 maps battery state during calibration, and skipping this step causes premature low-battery warnings on the first measurement session.
Delivery time

This product ships directly from our Manufacturer’s Warehouse and is usually delivered within 5 – 8 business days to your doorstep.

Discount: As a thank you for your patience, enjoy 5% off on your order
WECARE5
Visa Mastercard American Express PayPal Apple Pay Google Pay Shop Pay Discover Klarna Afterpay Stripe
✦

Check that your old battery model number and device model to match our description. This makes sure they work together.

✦

We ship your order same day if you buy it before 4 PM EST.

Warranty

Let customers speak for us

from 11 reviews

Product is exactly as described and arrived quickly

Robert Jones
Rocket ES4-12 Compatible Replacement Battery

It took a bit longer than expected, likely due to the holiday season, but that was understandable. So far, the battery seems to be working well!

Linda M.
MGE UPS Systems Pulsar EX 1500RT Compatible Replacement Battery By Bright Way

Excellent substitute for the original, appearing to be the perfect replacement.

Alberto J.
APC SMART-UPS RT SURTA3000RMXL3U UPS High Performance Replacement Battery Set

It was what i was looking for. Support is fast

Jaswal
WAHEGURUG - RADHASWAMI

Fast service

Mark Casias
BatteryWeb

Perfect fit

Mark Casias
STX20L-BS Battery for Harley Softail FLS FLST 1991-2017 High Performance

Works Perfectly!!

Ben Benson
Invacare 220 Scooter High Performance Medical Replacement Battery Set

Send Your Battery Photo

Expert Technician Help

Snap a photo or video of your battery and send it to us. We'll identify the exact replacement—fast and hassle-free. Our team has helped thousands of customers find the right battery quickly and easily.

POST YOUR BATTERY IMAGE
Product & Solutions Expert

Product & Solutions Expert

✉ sales@batteryweb.com

🔹 10+ Years Battery Experience 🔹 Fast & Accurate Identification

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.

Delivery and Shipping

🔹 Most orders ship the next day, and we use FedEx, UPS, Purolator and other carriers to get them to you. Lithium batteries have to ship by ground only, not air or USPS. Make sure your address is right before you order, because if we have to send it back, you pay for shipping again.

Disclaimer

⚠️ 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

3.7V

Amp

6700mAh

Fluke PLS 180G / 6XG45 Series — 3.7V Li-ion Replacement Battery (RBP5)

This 3.7V, 6700mAh lithium-ion pack replaces the OEM RBP5 battery across the Fluke PLS 180G, 6XG45, 6XG46, PLS 3G, and compatible survey and test instruments. It matches the original cell configuration and BMS handshake requirements of the platform. Capacity is sourced from cell data — 24.79Wh per pack.

  • PLS and 6XG platform compatibility: These models share the same battery bay dimensions, connector pinout, and BMS communication protocol. Swapping between them works because the instrument queries the pack over the same data line — voltage rail and handshake logic are identical across this family.
  • Bench tested on actual hardware: We cycled this pack under simulated sensor-load draw and monitored BMS response at probe initialisation. The protection circuit handled the current spike at power-up without tripping to lockout.
  • Post-install calibration step: After installing this pack, run a full calibration cycle through the instrument menu before field deployment. The instrument maps battery state during calibration — skipping this step causes premature low-battery warnings during your first measurement session.

BMS lockout after the PLS or 6XG sat unused in a carry case for months

Li-ion cells self-discharge slowly during storage. If the pack voltage drops below roughly 2.5V per cell, the BMS trips into deep-discharge lockout and the instrument will not recognise the pack at all. The charger may also show no activity. To recover, apply the OEM charger for at least 30–45 minutes before attempting to power the instrument on — the BMS needs to see a minimum threshold voltage before it exits lockout and re-enables the output rail.

Readings resetting or drifting mid-session during sustained sensor logging

Sustained sensor load draws more current than the instrument draws at idle, and an aged or partially charged cell shows voltage sag under that load. When voltage briefly drops below the instrument's internal cutoff threshold, the measurement module resets — you lose the active log. This is not a firmware issue. Charge the pack fully before a logging session and confirm resting voltage reads above 3.9V before starting data capture.

Compatible Models

6XG45 PLS 180G 6XG46 PLS 3G 6XG43 6XG44 PLS 6R PLS 5R PLS 3R PLS 180R PLS 6G PLS 5G

Replaces Part Numbers

RBP5 5023322

Technical Specifications

Voltage3.7V
Amp Hours6700mAh
Capacity6700mAh
Rate24.79Wh
Net Weight185g /6.53 oz
Gross Weight365g /12.88 oz
Approximate Weight365g /12.88 oz
Dimension 105.00 x 64.00 x 29.50mm

Product Highlights

  • Brand: Fluke
  • Manufacturer: CS
  • Series: Standard
  • Color: Yellow
  • Product Type: Li-ion
  • Battery Type: Li-ion
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

Frequently Asked Questions

The instrument powers on fine but shuts off the moment I connect the USB cable to transfer data to my laptop — what's happening?

USB data transfer adds a second draw on top of the instrument's active load — together they can push current demand past what a low or degraded cell can sustain without voltage sag. The BMS reads the sag as an undervoltage event and cuts the output rail. Charge the pack fully before any USB session, and confirm resting voltage is above 3.9V before plugging in.

My Fluke PLS instrument won't charge after sitting in storage for several months — the charger light just stays off or blinks immediately.

Self-discharge over several months can drop cell voltage below the BMS recovery threshold, typically around 2.5V per cell. Below that point the BMS blocks charge input entirely as a protection measure — the charger sees no valid pack and won't engage. Leave the OEM charger connected for 30–45 minutes regardless of indicator behaviour; if voltage recovers above the threshold the BMS will re-enable charge input and the light will change state.

The battery percentage jumps around at startup — shows 80%, then resets to 20% after the first measurement. Is the pack faulty?

The instrument's voltage-threshold fuel gauge is recalibrating to the new cell's discharge curve. A fresh cell has a slightly different open-circuit voltage profile than the worn pack it replaced, so the indicator overshoots until it has seen at least one full discharge-to-charge cycle. Run a full calibration cycle through the instrument menu after install — this lets the instrument remap its low-battery threshold to the new pack and stabilises the percentage readout from the next session onward.

Payment & Security

Payment methods

  • American Express
  • Apple Pay
  • Diners Club
  • Discover
  • Google Pay
  • Mastercard
  • PayPal
  • Shop Pay
  • Visa

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.

Related Products

Fluke 6XG45 Replacement Battery, 3.7V, 6700mAh, Li-ion 1

Engineered for Performance. Built to Last.

Check out our top-rated selection of reliable products built to last. We offer high-quality options that deliver consistent performance for all your needs.

Our Collections