Both are worth it, but at different priorities: a terminal cover is cheap insurance and every pack should have one; a case is an efficiency purchase that earns its keep as your pack count grows. The cover’s job is to shield the exposed terminals so keys, coins and cable ends cannot bridge them — the single most common risk when packs ride loose in a bag. The case’s job is inventory: charged on one side, spent on the other, numbered so you are not guessing by touch on a job. Neither costs much, and together they remove two recurring headaches.
What Terminal Covers Actually Prevent
- Short circuits: the NP-FZ100’s contacts are exposed metal. Tossed in a pocket or bag compartment with keys, coins or a cable plug, they can bridge and generate heat. A cover removes that risk almost entirely.
- Contact wear: repeated rubbing dulls the plating and leaves scratches, which raises the odds of poor contact and “not recognised” errors; the checks are in troubleshooting a battery the body will not read.
- Dust and moisture: sweat, rain and coastal salt spray all accelerate oxidation. A cover slows that down.
- Flight compliance: spare packs travelling in carry-on need their terminals protected. Original packaging, a cover or a tape cap all satisfy that.
- Quick identification: different coloured covers mark charged versus used far more reliably than memory.
What a Storage Case Actually Solves
- Inventory: with several packs in play, the usual mistake is not knowing which are charged. A case with two zones, or a flip-to-mark design, makes it obvious at a glance.
- Crush protection: a hard shell stops packs being deformed by other gear in the bag. A swollen pack especially must not be compressed — retire it and handle it as a safety issue.
- One place to grab: packs distributed across pockets mean a hunt before every outing. A case means one item to pick up.
- Travel and commuting: the more packs you carry, the more a numbered case reduces the chance of leaving one behind.
Buying Guide by How Many Packs You Carry
| Usage | Covers | Case | Recommendation |
|---|---|---|---|
| 1–2 packs, occasional shooting | Recommended | Optional | Buy a few covers and keep packs in original packaging |
| 3–4 packs, weekend regular | Essential | Recommended | A hard four-slot case with numbered rotation |
| 5+ packs, commercial or weddings | Essential | Essential | A case with charged/used zones, or several smaller cases |
| Studio or rental turnover | Essential | Essential | Logged numbering, replaced and managed by batch |
What to Look For
- Fit: the cover has to line up with the NP-FZ100 terminal layout. Loose falls off, tight is a fight to remove.
- Material: hard shell beats a soft pouch for crush resistance, and the case should survive being stacked on in a bag.
- Zoning: a design that separates charged from spent is the most useful feature, usually by orientation or a flip marker.
- Numbering: look for a labelling area, or a surface that takes a sticker, so you can build a rotation order.
- Size: if you travel, pick something that drops into a camera bag side pocket.
- Do not interfere with loading: a cover should only shield the terminal area. If the pack will not latch afterwards, check whether the cover is fouling the catch; the fitting sequence is in when a pack will not seat.
Habits That Make Them Pay Off
- Number your packs and rotate in order, so none sits idle long enough to self-discharge into trouble.
- Point spent packs one way and charged packs the other. One glance on set tells you everything.
- For long-term storage, hold roughly 40–60% charge, cool and dry at about 15–25°C, and top up every three months.
- Wipe terminals with a dry cloth periodically, and after any coastal or wet shoot.
- Count packs before you leave, and carry what the day consumes plus one.
Storage Habits to Avoid
- Loose packs sharing a pocket with keys, coins and cables.
- A plastic bag in a packed backpack, which prevents neither shorts nor crushing.
- Leaving packs in a camera bag side pocket in a hot car, which accelerates ageing.
- Putting a swollen pack back in the case or the camera. Retire it and deal with it separately.
FAQ
Is original packaging enough instead of covers?
For a while, yes — it protects the terminals just as well. Packaging wears out with repeated use though, so covers are the more durable answer for everyday carry.
Does a case make packs run hotter?
Stored packs are not generating heat, so no. Do take packs out and charge them on a ventilated surface rather than charging inside the case.
Do covers stop the pack going into the camera?
A correctly sized cover only shields the terminal area, and you take it off before loading. If the pack will not latch, check whether the cover is overhanging the catch.
What size case for how many packs?
Current count plus one. Three packs means a four-slot case, leaving room when you add another.
Sort the storage at the same time as the packs. YO’s NP-FZ100 compatible battery is rated around 2280mAh / 7.2V / 16.4Wh: about $17.89 for a single pack, about $22.93 with one charger, about $36.74 for two batteries and a charger. If you want more capacity in the same shell, the TNP-FZ100 is the 2400mAh / roughly 17.3Wh version. When you are kitting out several packs at once, the kit-versus-separate arithmetic is in why kits usually cost less. Bulk orders go through wholesale enquiry, where orders over 100 units are quoted per batch.