Short answer: for most people the premium a 1050mAh carries over a 950mAh is not good value. But if your pattern is two batteries at most per outing with no convenient place to swap, it is. The reason is simple: the two differ by a hundred milliamp-hours, about ten percent, which usually works out to a few dozen extra frames, while the extra money would buy a good part of a second 950mAh. What really decides the choice is not the capacity number but how many batteries you are willing to carry.
First, translate 100mAh into frames
A 100mAh difference in rated capacity is theoretically a 10.5% gain. But the usable window inside a camera is not the full capacity: the tail before cutoff voltage cannot be drawn, and the body’s estimate is conservative, so the practical gain is usually between 8% and 10%.
Frames are more intuitive. If a 950mAh manages roughly 450 to 600 frames under normal shooting, a 1050mAh lands around 500 to 650. In other words the extra is a few dozen frames of headroom in a day, enough for one more small scene, not enough to leave a battery at home.
| Item | 950mAh | 1050mAh |
|---|---|---|
| Rated capacity | 950mAh | 1050mAh |
| Relative capacity | Baseline | About +10% |
| Frames under normal shooting (estimated range) | About 450-600 | About 500-650 |
| Price band | Common at the budget end of the market | Usually a few tens more |
| Weight | Lighter | Slightly heavier, under fifteen grams more |
| Suited to | Rotating several packs, everyday carry | Carrying fewer packs, long uninterrupted days |
How to work out cost per shot
Do not compare total price divided by total capacity. That spreads the cost of the shell, protection board, and housing across the figure and hides the marginal return. What matters is the increment: how many additional frames the extra money buys.
- Note the real price difference between the two tiers. Estimating on the order of “a few tens more” is fine; you do not need it to the dollar.
- Subtract the midpoint of the 950’s frame range from the midpoint of the 1050’s. The increment is usually around fifty frames.
- Divide the extra frames by the price difference to get frames per extra dollar. The figure usually lands at one to two frames per dollar.
- Now run the alternative: spend the same money on a second 950mAh. That buys several hundred extra frames, or more than five per dollar.
The conclusion follows. On pure runtime efficiency, the marginal return from paying more for a 1050 is clearly below adding another 950. The 1050’s value is not efficiency but the act of carrying one fewer battery: the volume, the weight, the swap, and the seconds you lose doing it.
Three kinds of shooter, three conclusions
If you carry only two batteries, take the 1050. Your constraint is count, not total capacity. Two 1050s give you roughly what two 950s give plus a bit more, and that bit more is exactly what covers the unexpected shooting before you wrap.
If you habitually carry three or more, take the 950. When count is plentiful, per-battery capacity barely affects the outcome and rotation rhythm dominates. Three 950s already exceed two 1050s in total capacity at lower cost, and swapping is one extra motion.
If you shoot mostly video, look at it separately. Video is a continuous load with less tolerance for voltage sag at the end, so more capacity means the low-battery warning comes later and the finish is calmer. Even with three packs, this group can keep the 1050 in the primary slot.
Two hidden costs beyond capacity
The first is charging time. On the same dock, a 1050 takes ten or twenty minutes longer to fill. If you charge everything overnight, the difference disappears; if you top up between setups, time is a real cost.
The second is consistency. Mixing capacities makes the body’s gauge jump around and rotation planning gets messy. Running one tier is simpler, which argues for standardizing rather than buying one 950 and one 1050.
YO’s LP-E17 comes in 750, 950, and 1050mAh so that you can choose by how many packs you carry rather than by “bigger is better.” If you are still matching tiers to bodies, start with the capacity and compatibility guide, then compare specific products in the 1050mAh category.
FAQ
How many more frames does a 1050mAh give than a 950mAh?
A few dozen under normal shooting, on the order of fifty. Burst shooting, stabilization, and cold weather narrow the gap; static composition and less chimping widen it. Do not extrapolate linearly from the percentage, because discharge efficiency at the tail is not uniform.
Is paying a few tens more for 100mAh a waste of money?
Not entirely. If it lets you leave a battery at home, the saved weight and swap time have value. But if your bag already holds three or four packs, the extra frames are unlikely to be used, and then it is not worth it.
Can I run one 950 and one 1050 together?
Yes. Voltage and contacts match and the body does not distinguish them. Be aware that the gauge logic differs slightly and the low-battery warning will trip at different points, so charge both fully before important work and save the larger one for the second half.
On a tight budget, which should I buy first?
Buy the 950mAh first and put the money toward a second one. Two 950s beat one 1050 on both total runtime and flexibility; only when your bag space or carry habit strictly limits you to two packs should the 1050 come first.