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LR521 Zn-MnO₂ battery product photo
Zn-MnO₂

LR521 Battery

LR521/LR521H Alkaline Zn-MnO₂ Button. 7mAh capacity, 1.5V nominal — factory-direct from TIANQIU with OEM custom label & packaging, compliant with EU 2023/1542.

LR521/LR521H Alkaline Zn-MnO₂ Button — a 1.5V Zn-MnO₂ battery supplied factory-direct by TIANQIU, documented at 7mAh capacity. Every unit ships with UL, CE and EU 2023/1542 documentation, and the model is available for wholesale orders or OEM production under your own brand. Request the data sheet or a sample to confirm fit before ordering.
ULCEEU 2023/1542
0% mercury OEM / custom label MOQ & quote on request
At a glance

What is a LR521 battery?

LR521 (also sold as LR521H) is a 1.5V Zn-MnO₂ button cell rated 7mAh. Alkaline zinc-manganese dioxide cells deliver 1.5 V with a long shelf life, which makes them the everyday choice for low to medium drain devices such as toys, torches, meters and thermometers. TIANQIU manufactures and supplies it factory-direct, with OEM label and packaging.

Nominal voltage1.5V
ChemistryZn-MnO₂
Rated capacity7mAh
Also sold asLR521 / LR521H
Specifications

What are the specs of a LR521 battery?

Battery NameAlkaline Zn-MnO₂ LR521/LR521H button cell (non-rechargeable)
ModelLR521
CategoryPortable battery
Chemistry systemZn-MnO₂
Trade / BrandTIANQIU/No-brand/OEM brands
Shelf LifeOne years under normal storage conditions
Production DateAccording to customer requirements, generally printed on the battery body:Y-MFor example: 64=2026-04 6X=2026-10 6Y=2026-11 6Z=2026-12
Country of OriginChina

Alkaline zinc-manganese dioxide cells deliver 1.5 V with a long shelf life, which makes them the everyday choice for low to medium drain devices such as toys, torches, meters and thermometers. The LR521 is produced on our own lines in China and can be supplied as a bare cell, on a blister card or in a printed box. Each is marked for LR521 and ships with its own EU declaration of conformity.

Same family

Other Zn-MnO₂ cells in the range with a comparable capacity — swap only when the holder and the voltage allow it.

ModelChemistryNominal voltageTypical capacity
LR621Zn-MnO₂1.5V9mAh
LR626Zn-MnO₂1.5V13mAh
LR721Zn-MnO₂1.5V13mAh
Documents for the LR521: EU declaration of compliance TQ-EUDOC-LR521-20260701 · tested to IEC 60086-1:2021, IEC 60086-2:2021, IEC 60086-3:2021, IEC 60086-5:2021. Datasheet and declaration links are in Related documents.
Performance

How does the LR521 perform?

Approx. WeightCapacityMAD
0.2g7mAh350.0 hours
Capacity & MAD test condition: 68KΩ 24h/day to 1.2V @ 20±2℃
Approx. weight only for reference
Materials

What raw materials does the LR521 contain?

ManganeseGraphite
Safety & Compliance

Is the LR521 compliant with EU 2023/1542?

LR521 is supplied under EU Regulation 2023/1542. Each shipment carries the EU declaration of conformity (No. TQ-EUDOC-LR521-20260701), tested against IEC 60086-1:2021, IEC 60086-2:2021, IEC 60086-3:2021, IEC 60086-5:2021, and an MSDS.
CE marking
CE marking
Separate collection
Separate collection
Keep out of reach
Keep out of reach
Do not recharge
Do not recharge
Ordering

What do buyers ask before ordering the LR521?

How long does a LR521 battery last?
LR521 is rated 7mAh and runs for 350.0 hours under our published test — test conditions: 68KΩ 24h/day to 1.2V @ 20±2℃. Service life in your device depends on the load and the cut-off voltage, so send us the device and we will size the cell for it.
What is inside a LR521 battery?
The LR521 is built from Manganese, Graphite — a Zn-MnO₂ system at 1.5V, rated 7mAh, about 0.2g. The material list belongs to this model's technical file, and the MSDS for the chemistry comes with the documentation set.
How long can a LR521 be stored?
Our storage statement for the LR521 reads: One years under normal storage conditions. Keep the cells in the original packaging; the storage and transport guidance that applies to this 1.5V Zn-MnO₂ model goes out with the shipment paperwork.
Is the LR521 rechargeable?
No — the LR521 is a primary (non-rechargeable) cell. Charging a primary cell can cause leakage or rupture, so replace it rather than recharge it. If your application needs recharging, ask us for the rechargeable range.
Which documents come with a LR521 order?
Each LR521 consignment carries its own EU declaration of conformity (reference TQ-EUDOC-LR521-20260701) and an MSDS. Transport documentation is issued for the consignment as the destination market requires.
How do I order the LR521 in bulk?
Send the model, your annual quantity and the packaging format. First orders start from 50 cartons per product line, and printing on the cell, blister card and box is done in our own plant with your logo and barcode.

How do I get LR521 wholesale pricing?

Factory-direct with OEM custom label & packaging. Samples available.

Downloads

Which documents are available for the LR521?

Last updated:

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