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Views: 0 Author: Site Editor Publish Time: 2026-05-20 Origin: Site
The 9‑volt square battery, commonly marked as 6LR61, is one of the most widely used disposable power sources in daily electronics, industrial instruments and household safety devices. Many users are familiar with its block‑shaped appearance but unclear about its internal specifications, performance differences and suitable scenarios. This article systematically introduces the core parameters, working principles, typical applications and usage tips of the 6LR61 alkaline battery, helping users make correct selection and safe operation.
6LR61 is the IEC standard model for a 9V primary alkaline battery. The naming rule can be explained as follows:
6: Six 1.5 V cylindrical alkaline cells connected in series to reach 9 V output
L: Alkaline manganese dioxide chemistry
R: Round‑shaped internal cells
61: Standard size code for the 9V square battery housing
It is a non‑rechargeable battery with potassium hydroxide electrolyte. Compared with carbon‑zinc 9V batteries (6F22), 6LR61 features higher energy density, longer shelf life, lower self‑discharge and more stable voltage during discharge.
Below are the standard key parameters of a qualified 6LR61 alkaline battery, widely adopted in global manufacturing standards:
Nominal Voltage: 9 V DC; stable discharge range: 6.0 V–9.6 V
Typical Capacity: 500–600 mAh under standard discharge conditions
Standard Dimensions: 48.5 mm × 26.5 mm × 17.5 mm
Shelf Life: 3–5 years at 10–25 °C dry storage; annual self‑discharge rate ＜3%
Operating Temperature: −20 °C to +60 °C; capacity drops obviously below 0 °C
Electrolyte: Alkaline (KOH), low‑leakage sealed structure
These parameters ensure stable power supply for low‑to‑medium current devices and long‑term standby performance for safety equipment.
Thanks to its compact size, reliable voltage output and long standby time, 6LR61 is applied across household, commercial and industrial fields:
This is the largest application field. It is widely used in smoke detectors, carbon monoxide alarms, gas sensors, wireless microphones, multimeters, portable radios, infrared thermometers and high‑end remote controls. For safety alarms, long shelf life and low self‑discharge are critical advantages of 6LR61.
In industrial environments, 6LR61 serves as power for portable measuring tools, environmental sensors, door contact sensors, wireless alarm systems and inspection equipment. Its stable discharge ensures accurate data collection and continuous monitoring.
It powers professional wireless microphones, electronic musical instruments, large‑size electronic toys and portable audio devices, providing consistent current for short‑term high‑power use.
Distinguish alkaline vs carbon‑zinc batteries
6LR61 = alkaline high‑performance type; 6F22 = carbon‑zinc low‑cost type. Choose 6LR61 for long‑life devices such as smoke alarms.
Check production date and shelf life
Fresh batteries guarantee full capacity; avoid over‑stocked old batteries with capacity loss.
Match discharge current requirements
High‑current devices (microphones) require high‑quality low‑internal‑resistance 6LR61; low‑current standby devices fit general‑grade alkaline batteries.
Avoid mixing battery types
Do not use 6LR61 with Ni‑MH rechargeable 9V batteries (nominal 8.4 V), which may cause abnormal device operation.
Do not recharge 6LR61; recharging may cause leakage, overheating or explosion.
Prevent short‑circuit by metal contact between positive and negative terminals.
Replace all batteries at the same time; mixing old and new ones leads to over‑discharge and leakage.
Store in cool, dry places away from high temperature and direct sunlight.
Dispose of used batteries according to local environmental regulations.
As the mainstream standard 9V square battery, 6LR61 alkaline battery balances performance, stability and cost‑effectiveness. Mastering its core parameters and application rules allows users to select the right battery for different devices, extend equipment service life and ensure long‑term safe operation.
