A battery error is worth taking seriously, but first separate the two cases. “The remaining charge may not be displayed accurately” is normal — keep shooting; only the percentage is approximate. “Cannot recognize this battery” or “this battery cannot be used” means the body is refusing to draw power, and that needs troubleshooting. The usual causes are dirty contacts, the wrong model, cold, wear or an outright fault. Work through the steps below in order, simplest first, and you’ll normally have it identified within ten minutes.
What the three messages actually mean
| Message | Meaning | Can you shoot? | What to do |
|---|---|---|---|
| Remaining charge may not be displayed accurately | Standard message for a non-genuine pack | Yes | Nothing needed; keep a margin |
| Cannot recognize this battery / use a compatible battery | Communication or power fault | No | Run the steps below |
| Battery exhausted / replace the battery | Voltage below the operating threshold | No | Fit a charged pack |
The first message appears on many Sony bodies. In essence the camera can’t fully verify a third-party pack’s discharge curve, which has no effect on power delivery or shooting. If runtime looks normal, just carry on.
Troubleshooting: simplest first
Step 1 — Reseat the pack
Power down, take the pack out, wait a few seconds and push it back in until the latch clicks. A pack that isn’t fully seated makes poor contact, and it’s both the most common cause and the easiest one to miss.
Step 2 — Clean the contacts
Wipe the pack terminals and the metal contacts in the compartment with a dry soft cloth or a pencil eraser, removing oxidation, sweat and dust. Skip liquids other than alcohol and never scrape with metal tools, which damages the plating. Refit and test.
Step 3 — Confirm it actually has charge
Put the pack in the charger and check whether the indicator lights and charging starts. No response at all points to the pack or the charger — move on to charging troubleshooting steps.
Step 4 — Check the model
This is the most common trap. The NP-FZ100 serves the A7 III, A7R III/IV/V, A7 IV, A7S III, the A9 series, A1, A6600, A6700, the A7C series, FX3, FX30 and ZV-E1. The A6400, A6500, A6300, A7 II, A7R II and A7S II take NP-FW50, and the RX100 series uses NP-BX1 — none of them interchangeable. Buying the wrong model and finding it won’t fit, or won’t be recognized, happens constantly; the Sony mirrorless battery cross-reference settles it.
Step 5 — Warm it back up
Cold pulls cell voltage down and the body may decide the pack is unusable. Below freezing, capacity drops noticeably and around -10°C you may see roughly half of normal. Keep the pack in a pocket for a few minutes, then refit — it will often be recognized straight away.
Step 6 — Cross-test to find the culprit
Fit a pack you know is good into this body. If the good pack works, the problem is with the original one. If the good pack is also rejected, look at the compartment, contacts or firmware. Going the other way — the suspect pack into a second body of the same model — confirms the same thing from the other side.
Step 7 — Inspect the pack
Look for swelling, deformation, cracks or any smell, and for corrosion on the terminals. Any swelling means stop using it immediately, no further charging, and follow swollen battery safety steps. A pack that looks fine but is two or three years old can also have risen enough in internal resistance for the body to reject it.
Step 8 — Rule out the camera
If several packs are all rejected, check the compartment for debris, visibly bent contacts or a loose spring, and update the firmware if you can. A hardware fault on the body side is a service matter, not a battery problem.
When to just replace it
- The error keeps coming back on one specific pack after cleaning, warming and cross-testing.
- That pack empties quickly after a full charge, or falls from two bars straight to shutdown.
- Any swelling, deformation, leak, smell, or clear heat while charging.
- Two to three years old, near 300–500 cycles, with capacity around 80%.
For the first two, run one full charge and discharge calibration first — how to recalibrate the charge display — and judge after that. The last two are safety issues; replace without further use.
Reducing these errors day to day
- Keep terminals clean and dry; wipe them down after seaside or wet shoots.
- Store at 40–60% charge and top up every three months to avoid over-discharge.
- Number your packs and rotate, so none sits long enough to self-discharge.
- Use terminal covers in storage so contacts can’t rub against metal.
- Match model to body when buying. Don’t order on looks alone.
FAQ
It’s rejected in this body but fine in another. What now?
The pack is probably fine. Focus on the compartment contacts — clean them and retry; check for deformation too. If it still fails, consider firmware or hardware on the body side.
A brand-new pack was rejected on first fit. Is it dead?
Check the model matches and that no protective film is left on the contacts, then run one full charge and retry. If it still errors, contact the seller for a replacement. Don’t open it yourself.
Do I need to act on “remaining charge may not be displayed accurately”?
No. It’s a common message and you can keep shooting. Just make “swap at one bar” a habit rather than trusting the percentage.
Are third-party packs more prone to this?
Contact condition and usage habits matter far more than whether the pack is genuine. A compatible pack built to spec behaves comparably in normal use, and when an error does appear the same steps apply.
Once you’ve confirmed the model, keep a reliable spare on hand: our NP-FZ100 compatible battery is rated 2280mAh / 7.2V / roughly 16.4Wh, around $17.89 per pack, around $22.93 with one charger and around $36.74 for two batteries plus charger, with the TNP-FZ100 (2400mAh, roughly 17.3Wh) at about $19.66 / $24.70 / $39.92. Studios and rental houses replacing packs in volume should use wholesale inquiry — orders above 100 units are quoted by batch.