Pixfra Australia Field Journal · How-To
Nothing ends a night faster than a flat thermal. Runtime is one of those specs people ignore at purchase and curse in the paddock, but with a few habits you can comfortably get through a session — and never be that person walking back to the ute in the dark because the scope died on the good bit. Here’s what drains a thermal, and how to make the charge last.
Quick verdict
Carry a power bank, use standby between sightings, and turn down what you don’t need. The biggest drains are display brightness, an active laser rangefinder, video recording and Wi‑Fi/streaming. Most Pixfra units run on removable/rechargeable cells and accept USB‑C top-ups, so a small power bank effectively gives you unlimited runtime. Use the standby/sleep function while you’re walking or waiting, and keep spare cells warm in a pocket on cold nights.
What actually drains the battery
A thermal’s sensor and processor draw a steady baseline, but the extras are what shorten your night. In rough order of appetite: a bright display (the single easiest saving), the laser rangefinder if it’s pinging constantly, video recording, and Wi‑Fi or phone streaming running in the background. None of these are bad — they’re why you bought the scope — but leaving them all on full when you don’t need them burns charge for nothing.
Settings that stretch runtime
| Setting | Do this | Why it helps |
|---|---|---|
| Display brightness | Run only as bright as you need | Biggest single drain; your eyes adapt to lower easily at night |
| Standby / sleep | Use it while walking or waiting | Cuts most of the draw without a full shutdown/boot |
| Wi‑Fi / streaming | Off unless you’re recording to a phone | Background radios drain steadily |
| Video recording | Record the moments, not the whole night | Continuous capture eats charge and storage |
| Rangefinder | Range when needed, not constantly | Each laser ping draws power |
Plan your power, don’t hope
The single best habit is to carry a power bank. Most Pixfra thermals use rechargeable cells and take a USB‑C feed, so a modest 10,000 mAh bank in your pack can top the scope up between sightings or run it directly — turning a fixed battery life into an all-night one. If your unit uses removable cells, carry a charged spare or two; a swap takes seconds. Either way, start the night on a full charge and know roughly how long your unit runs so you’re planning, not guessing.
Cold nights need a little extra thought
Lithium cells lose capacity in the cold, so a battery that lasts all evening in summer can fade faster on a frosty winter night. Keep spare cells and your power bank in an inside pocket where your body heat keeps them warm, and they’ll deliver closer to their rated capacity when you swap them in. It’s the same reason phones die quickly in the cold — nothing wrong with the battery, just physics.
Look after the battery long-term
Runtime also depends on the cell staying healthy over years. Don’t store a thermal fully flat for months; a partial charge is kinder to lithium cells. Avoid cooking it in a hot car or a closed case in summer. These are the same habits that protect the rest of the optic, which we cover in looking after your thermal. And whatever runtime you plan for, make sure it covers the whole job — including zeroing before the season, which shouldn’t eat into your hunting charge (see how to zero a thermal).
See the thermal range
USB‑C top-ups and removable cells across the range — genuine local stock, GST included, backed by C.R. Kennedy.
Frequently asked questions
How can I make my thermal scope battery last longer?
Lower the display brightness (the biggest drain), use the standby function while walking or waiting, turn off Wi‑Fi and streaming when you’re not recording, and range only when needed. Carrying a USB power bank or a charged spare cell effectively removes runtime as a limit.
What drains a thermal’s battery fastest?
Display brightness first, then a constantly active laser rangefinder, continuous video recording, and background Wi‑Fi or phone streaming. Turning down or switching off the ones you’re not using at any moment noticeably extends runtime.
Can I run a thermal from a power bank?
Most Pixfra thermals accept a USB‑C feed, so a small power bank can top them up between sightings or run them directly. A 10,000 mAh bank in your pack turns a fixed battery life into effectively all-night runtime.
Why does my thermal battery die faster in cold weather?
Lithium cells lose capacity in the cold. Keep spare batteries and your power bank in an inside pocket so body heat keeps them warm; they’ll then deliver closer to their rated capacity when you swap them in.
How should I store a thermal to protect the battery?
Store it on a partial charge rather than fully flat, and avoid heat like a closed case in a hot car. Long-term flat storage and high temperatures both shorten a lithium cell’s life.
Find them first: a thermal spotter
Scanning is half the game, and it starts with a handheld spotter. For that, look at Pixfra Sirius, Pixfra Mile 2 and Pixfra Arc LRF. Every one is genuine local stock with full Australian warranty, serviced right here through C.R. Kennedy and never sent overseas.
