Built for working tradies—this listing covers two OEM parts pros reach for when they need their detector back on song: the Inficon 721-702-G1 lithium-ion battery for D-TEK Stratus / D-TEK 3, and the Inficon 712-102-G1S replacement circuit board for D-TEK Select. If you’re chasing leaks all day and want fewer call-backs, these parts are fair dinkum the simple fix.

Who it’s for: licensed HVAC/R techs, apprentices and contractors who want OEM reliability and fewer hassles on site.

How it helps: the right battery keeps you on the tools longer; the right PCB restores D-TEK Select performance so you can trust your beeps and move on. Too easy, no worries.

Key features & trade benefits

• 721-702-G1 Li-ion battery (D-TEK Stratus / D-TEK 3) — OEM fit and chemistry for dependable runtime, so you can finish a full day’s leak checks without hugging a wall charger. 
• Approx. 8–10 hours per charge — real-world runtime depending on detector mode; great for service runs and commissioning. 
• 712-102-G1S PCB (D-TEK Select only) — genuine replacement board to bring back stable sensitivity and accuracy, saving time on nuisance retests. 
• Light, compact, job-ready — easy carry in the tool bag; swap in seconds to keep momentum up between calls.
• OEM quality — parts built to the detector spec, so your instrument integrity (e.g., EN 14624 performance on Stratus) stays right where it should be.

Why this product matters

Quick yarn: a tech in Western Sydney climbed up a tin roof in 40-degree heat to trace a stubborn R410A leak. Battery swap took seconds, detector stayed sharp, leak was nailed near a flare nut, and the system was back online before lunch. That’s the difference an OEM battery and a healthy board make—fast diagnoses, fewer call-backs, happier clients. She’ll be right.

Need more gear or to compare detectors? Swing by our Leak Detectors collection for pro-grade options.

Pro tip

Label batteries with a month/year and rotate them. For PCB swaps, use an ESD strap and follow the service manual steps—seat connectors fully and avoid pin stress. A careful 5-minute bench job beats hours of head-scratching later.

Compatibility & system info

• 721-702-G1 battery: compatible with INFICON D-TEK Stratus and D-TEK 3. 
• 712-102-G1S circuit board: compatible with INFICON D-TEK Select (not for Stratus/3). 

Local note: Brisbane humidity and Perth rooftop heat can be brutal—keep a spare battery charged in the van and you’re laughing.

What’s included

• Option A — 721-702-G1 Li-ion battery (1 pc)
• Option B — 712-102-G1S replacement circuit board (1 pc)

Specifications

Warranty & returns

These are genuine OEM parts supplied by HVAC Shop. Warranty is per manufacturer terms, and returns follow our store policy. For details, see Shipping & Returns before purchase. (If you’re unsure, reach out—ripper service, quick replies.)

FAQs

Will the 721-702-G1 battery fit my D-TEK 3 as well as Stratus?

Yep—both Stratus and D-TEK 3 use this OEM Li-ion pack, so you can standardise spares across the crew. 

For safe handling of refrigerants and compliance in Australia, see the Australian Government’s refrigeration and air conditioning guidance: environment.gov.au.