The short version: if you do not own a working charger yet, or you are buying two packs anyway, the kit usually wins. If you already have a charger you are happy with, just buy the pack. Here is the actual structure. Adding a charger to a single pack costs about $5 — that is the gap between roughly $17.89 for a bare battery and roughly $22.93 for one battery with a charger, and you will struggle to buy a comparable charger on its own for that. From there, the two-battery kit at about $36.74 costs well under a dollar more than two bare packs, and it includes the charger. The real question is what you are missing, not whether kits are universally better.
The Price Structure
| Configuration | NP-FZ100 (2280mAh) | TNP-FZ100 (2400mAh) | Charger included |
|---|---|---|---|
| Single battery | ~$17.89 | ~$19.66 | No |
| One battery + one charger | ~$22.93 | ~$24.70 | Yes |
| Two batteries + one charger | ~$36.74 | ~$39.92 | Yes |
Read the first two rows together and the charger works out at roughly $5. Read the first and third together and two bare packs come to about $35.78 against $36.74 for the kit — less than a dollar for the charger, which is the whole argument for kits. The same shape holds for the TNP-FZ100 at 2400mAh / roughly 17.3Wh.
Four Common Starting Points
- First spare pack, original charger only: original chargers usually handle one pack and are not the friendliest to travel with. The one-battery kit is the better buy, and a second charger lets you keep one at home and one in the bag.
- You already have a charger that works: buy a bare pack. There is no point paying for a second one unless you specifically want dual-bay throughput; sizing is in multi-bay chargers for four packs a day.
- You know you need two packs: take the two-battery kit. It beats buying separately and it arrives in one shipment.
- Three or more packs, team or studio: work out how many chargers you actually need first. One charger per two packs is normally enough, so buy extra packs bare, and go through wholesale for the volume.
Three Less Obvious Benefits of a Kit
- The spec matches by construction: the charger and packs are designed as a pair, so you skip the voltage, connector and polarity checks, and you reduce the odds of a flashing red light or a pack that will not take a charge; the light states are in reading the indicator lights.
- One decision instead of three: buying separately means picking a charger brand, reading its parameters and comparing prices. A kit collapses that into one line.
- Easy to split up: two chargers means one stays at home and one lives in the camera bag, so you are less likely to leave without one.
When Buying Separately Is the Better Call
- You already own two or more chargers. Another one is clutter.
- You need a specific charger shape — multi-bay, USB input, or one with a display — that the standard kit charger does not cover.
- You are topping up by one pack and know you will not want another charger soon.
- You want to mix capacities: say you already run 2280mAh packs and want to add a 2400mAh TNP-FZ100. A bare pack gives you that flexibility.
Sort Out How Many Packs You Need First
Before you pick a kit, settle the count. A normal day consumes one to two packs, so two in the bag covers most people. Weddings and commercial work can run three to four in a day, so plan on consumption plus one spare.
More packs is not automatically better. A pack that sits unused for months self-discharges and can be ruined by inattention. For long-term storage, hold roughly 40–60% charge and top up every three months, and they will stay healthy.
One Check Before You Order
- Confirm the body really takes an NP-FZ100 rather than an NP-FW50 or NP-BX1. The A6400, A6500 and A7 II families are the usual mix-ups.
- Decide on capacity: 2280mAh at roughly 16.4Wh, or 2400mAh at roughly 17.3Wh. The real-world difference is modest but it is there.
- Decide on charger type: mains or USB input, depending on how you travel.
- Consider terminal covers and a case while you are ordering, as covered in terminal covers and storage cases.
FAQ
Will a kit charger work with an original Sony pack?
Physically it usually will, since the form factor is the same. Confirm the charger lists support for the spec and watch that the light behaves normally.
Is it much dearer to add a charger later?
A charger bought on its own normally costs more than the roughly $5 it adds inside a kit. If you know a second charger is coming eventually, buy the kit now.
Is one charger enough for two packs?
Yes, if you have a proper overnight window. If you need to top up during the day, add a second charger or move to a dual-bay unit.
Can I mix 2280mAh and 2400mAh packs?
Yes. Both share the same shell and latch and fit the same bodies. Just plan runtime around the lower figure.
Pick the row that matches what you own and you are done. YO’s NP-FZ100 compatible battery is rated around 2280mAh / 7.2V / 16.4Wh: about $17.89 for a single pack, about $22.93 for one battery with a charger and about $36.74 for two batteries and a charger. The TNP-FZ100 at 2400mAh / roughly 17.3Wh runs about $19.66, about $24.70 and about $39.92 across the same three configurations. Studios, rental houses and resellers buying in volume should go through wholesale enquiry, where orders over 100 units are quoted per batch.