TIANQIU364 Battery - 1.55V Silver Oxide Coin Cell
The 364 silver oxide 1.55V coin cell — 6.8mm diameter, 18mAh capacity. Ideal for watches, micro devices.
What are the specifications of a 364 battery?
The 364 is a Silver Oxide coin cell rated 1.55V, with a nominal capacity of 18mAh. It measures 6.8mm across and 2.1mm thick, and weighs 0.25g. The table below gives the full specification — final values are confirmed on the OEM spec sheet for your project.
| Chemistry | Silver Oxide |
|---|---|
| Voltage | 1.55V |
| Diameter | 6.8mm |
| Thickness | 2.1mm |
| Capacity | 18mAh |
| Weight | 0.25g |
| Compatible | 364 = SR621SW = AG1 |
Specs for reference — final values per OEM project.
364 vs SR621SW: Is It the Same?
Yes. The 364 watch battery equals SR621SW and AG1 — a 6.8mm x 2.1mm, 1.55V silver-oxide cell. It is a thin watch battery and is interchangeable with SR621SW.
What batteries are equivalent to the 364?
The 364 is interchangeable with any cell of the same diameter, thickness and voltage, so an equivalent can be substituted without changing the device. Buyers look these cells up under three numbering systems at once — IEC, ANSI and manufacturer codes — and the list below covers the names the 364 is sold under.
Look any number up in the cross-reference tool → — type the marking on your cell and see where it lands, or pick your device and see the cells we supply for it.
Same cell, other designation or brand code — direct replacement
| Number on the cell | Published by |
|---|---|
| SR621SW | IEC type for this size · Maxell cross-reference chart · Renata cross-reference guide (printed there as the standard designation for 364) |
| 364 | Energizer (own model) · Duracell · Maxell cross-reference chart |
| D364 | Duracell (own code) · Maxell cross-reference chart, Duracell column |
| V364 | Varta (own code) · Maxell cross-reference chart, Varta column |
| SB-AG | Seiko (own code) · Maxell cross-reference chart, Seiko column |
| 280-34 | Citizen (own code) · Maxell cross-reference chart, Citizen column |
| 602 | Bulova (own code) · Maxell cross-reference chart, Bulova column |
| T | Timex (own code) · Maxell cross-reference chart, Timex column — single source, treat as unconfirmed |
| SR60 | Vinnic / GP (own code) · Maxell cross-reference chart — single source, treat as unconfirmed |
Same diameter, other thickness — check the case before substituting
The 6.8 mm family is the easiest place to fit the wrong cell, because the diameters match and only the height changes.
| Number on the cell | Published by |
|---|---|
| 377 / SR626SW / 376 | IEC type and manufacturer codes — 6.8 × 2.6 mm, 0.45 mm taller than the 364; Maxell cross-reference chart · Renata cross-reference guide |
| 321 / SR616SW | IEC type — 6.8 × 1.65 mm, 0.5 mm thinner than the 364; Maxell cross-reference chart, Varta and Seiko columns |
NOT this cell — a number that gets confused with 364
379 is a different diameter, not a different code for the 364. It comes up in retail listings as a 364 alternative; it is not one.
| Number on the cell | Published by |
|---|---|
| 379 / SR521SW | 5.8 × 2.1 mm — Maxell cross-reference chart and Renata cross-reference guide both put 379 at 5.8 mm diameter, 1.0 mm smaller than the 6.8 mm 364. It will not make reliable contact in a 364 holder and can sit loose in the case — we removed it from our own equivalent list for this reason |
Where is the 364 battery used?
The 364 is used in watches, micro devices and other compact devices that draw small currents over long periods. Its 1.55V output and 18mAh capacity suit equipment that has to run for months without a battery change. The blocks below set out what to check for each device type.
364 Watch Battery
The 364 is a common watch battery cell. Match the model number on your old cell (364 = SR621SW = AG1) to the one you replace it with — same size and voltage means an easy swap.
What do buyers ask about the 364 battery?
Need the 364 priced, or the same cell printed and packed under your own brand? Send the quantity, the target market and the packaging format, and we return price, MOQ band and the 364 data sheet.
Printed, blister-carded and boxed in our own plant, from 50 cartons per product line. Samples are available before a production run — tell us the device the cell goes into.
364 Battery FAQs
What is a 364 battery?
What is the 364 compatible with?
What is a 364 battery equivalent to?
Is the 364 rechargeable?
How long does a 364 battery last?
Does a 364 fit my device?
How do I get 364 battery wholesale pricing?
Pricing depends on cell grade, quantity and packaging, so quotes are issued per project rather than from a fixed list. Send your quantity, target market and label or packaging requirements, and we return a landed-cost quote together with samples — usually within one working day.
Which batteries are related to the 364?
These models share chemistry, voltage or form factor with the 364 and are frequently specified alongside it. Where a device accepts more than one size, confirm the battery-bay dimensions before ordering — each card below links through to the full specification and equivalents.