SR416, SR416SW, SR416S, 337, LR416 Battery Equivalents and Replacements
SR416SW is very small button cell battery, commonly used in wrist watches, but also in calculators, credit card size devices, CMOS battery, etc.
Common labels of these batteries include SR416, SR416SW, SR416S, 337, LR416, and a few more, but most reputable brands commonly use 'SR416SW', often combined with the '337' label.
Updated: September 7, 2023.
SR416, SR416SW, SR416S, 337, LR416 Battery Features and Specifications
SR416SW/337 battery is a really small battery, featuring a diameter of 4.8 mm and a height of 1.6 mm (~0.189 x 0.063 inches), and working directly with these batteries can be troublesome, especially for larger guys (been there, done that).
The best working tools for these batteries are, of course, fingers with gloves (to prevent short-circuiting of these batteries) and special plastic tweezers.
SR416SW/337 batteries can be found commonly as silver-oxide batteries, which are labeled SR416, SR416SW, SR416S, or 337.
Alkaline 4.8x1.6 mm batteries are rare, and if found, they are labeled as LR416 batteries. Their nominal voltage is 1.5 volts, but it quickly drops over time, which is not desirable when used in electronic devices. Also, alkaline 4.8x1.6mm batteries feature lower capacity, lower energy density, higher self-discharge rate, etc., and are thus very rare on the market. Even if found, silver-oxide 4.8x1.6mm batteries are worth a somewhat higher price.
Since these batteries are used for watches and other sensitive electronics, many battery brands manufacture silver-oxide 4.8x1.6 mm batteries (labeled as SR416, SR416SW, SR416S, 337), and such batteries should be an obvious choice.
Silver-oxide SR416SW/337 batteries feature a capacity of around 8 mAh - this doesn't sound much (and it isn't!), but it is enough for CMOS-based and other similar units.
SR416SW/337 batteries are mostly used for powering wrist watches without background lights and alarms - such high-drain applications may significantly shorten their lifetime.
Silver-oxide SR416SW/337 batteries' nominal voltage is 1.55 volts and is fairly stable during operation, with a cutoff voltage of around 1.2 volts.
Note: actual cutoff voltage depends on the device being powered, but most units being powered with silver-oxide batteries support their use down to 1.2 volts per cell. Also, these are NOT rechargeable batteries - when they are 'dead', replace them with new batteries and dispose of them properly (they must be properly recycled).
SR416SW/337 Batteries Comparison Chart
The following comparison chart lists some of the most important features and specifications of several very popular SR416SW/337 batteries:
| Battery Datasheet |
Capacity | Operating Temperature Annual Self-Discharge Rate |
Discharge Current |
| Energizer 337 (Obsolete) |
8.3mAh over 100 kΩ down to 1.2V @21°C | - <2% @20°C |
16μA over 100kΩ @21°C |
| Renata 337 SR416SW | 8mAh over 56.2 kΩ down to 1.2V @23±3°C | -10°C to +60°C <7% @23±3°C |
27.8μA over 56.2kΩ @23±3°C |
| Seiko SR416SW | 7.5mA | -10°C to +60°C - |
- |
| Varta V337 | 9mAh over 68.1 kΩ down to 1.2V @20°C | 0°C to +60°C - |
- |
As one can see, these are very small batteries intended for powering of small, tiny devices that require very low currents, but they do need reliable power sources - hence silver-oxide batteries and not alkaline batteries!
SR416SW/337 Batteries Frequently Asked Questions
Here are some of the most common Frequently Asked Questions (FAQ) about button/coin cell 4.8x1.6mm batteries.
What battery is equivalent to SR416W?
Practically any silver-oxide 4.8x1.6mm battery from the most common battery brands is equivalent to SR416SW battery - they share the very same batter chemistry, very similar capacity, maximum and cutoff voltages, and very similar discharge characteristics.
Alkaline 4.8x1.6mm batteries can be used instead of silver-oxide 4.8x1.6mm batteries, but devices requiring very stable output voltage may have issues due to the use of alkaline batteries.
How long does a SR416SW battery last?
On average, SR416SW/337 batteries feature self-discharge rate of 2-8% per year when stored and used at room temperatures - that is storage time of ~2.5-5 years.
When used in devices that feature low drain, SR416SW batteries may easily die due to their age and not due to them being discharged.
Silver-oxide SR416SW/337 Safety Concerns
Since SR416SW/337 batteries are so small, keep them away from kids and pets. If they accidentally get swallowed, contact the doctor/vet and act according to their instructions.
These batteries don't contain mercury (if they do, don't buy them), but when swallowed, fluids in the human body close the circuit, causing various chemical reactions to start. Although it is not the same to swallow an 8mAh and 250mAh battery, if something like that happens, contact emergency services immediately.
Long Story Short: SR416, SR416SW, SR416S, or 337 batteries are not so common batteries, but they can be easily found at online shops, and thanks to fast delivery, you can have them rather quickly.
Considering their size, they are not the cheapest button cell batteries on the market, so if you need these, go for reputable sellers with good battery reviews.
Some of the most popular SR416SW/337 battery models are (in alphabetic order; Amazon links, open in the new windows):
- Energizer SR416SW/337 Battery
- Maxell SR416SW/337 Battery
- Renata SR416SW/337 Battery
- SKOANBE SR416SW/337 Battery
Again, although they are mercury/cadmium free, keep them away from kids and pets - they are really, really small batteries ...