Rm 640 Battery
Overview
Product sourcing insights & recommendations
The RM 640 (or PX640) battery is a legacy format primarily used in vintage cameras like the Yashica Electro 35 and Minolta Hi-Matic. Originally a mercury cell (1.35V), it has been replaced by 1.5V alkaline versions (PX640A), though the voltage difference remains a key pain point for photographers seeking light meter accuracy.
The market report below details technical specifications, modern replacement strategies including voltage-reducing adapters, and broader market trends including the rise of high-capacity 640Ah lithium power systems. Check the file for the full analysis and sourcing recommendations.
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Px640a A640px Alkaline Battery 1.5v
Products · 2 lists
Manufacturer's Best-selling Dry Battery 1.5v Lr6 Aa Alkaline Battery
Guangzhou Hermann Trading Co., Ltd.🇨🇳CN7 yrs
Alkaline Battery 1.5V AG13 357 CR44 SR44 357 SR44W G13 A76 A-76 PX76 675 1166A
Shenzhen Everwin Tech Co., Limitedverified🇨🇳CN17 yrs
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Promax Battery Industries Limited.🇨🇳CN5 yrs
1.5V AA Size/lr6/am-3/no.5 Non Rechargeable Alkaline Battery for Clock and Remote Control
Changzhou Kiwin Energy Co., Ltd.🇨🇳CN9 yrs
China Brand 1.5v Battery AA Alkaline Battery Lr6 Battery
Shandong Huatai New Energy Battery Co., Ltd.verified🇨🇳CN2 yrs
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Shuyang Xinneng Battery Co., Ltd.verified🇨🇳CN4 yrs
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Ansmann Electronics (Huizhou) Co., Ltd.🇨🇳CN4 yrs
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Martin and Mary AA LR6 Alkaline Battery 1.5V 4pcs Retail Card Pack for Grocery Stores, Mini Markets, Toys and Remote Controls
Golax Industrail Co., Ltd.🇨🇳CN25 yrs
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Shenzhen Pkcell Battery Co., Ltd.verified🇨🇳CN20 yrs
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Shenzhen Pkcell Battery Co., Ltd.🇨🇳CN12 yrs
AAA AA 1.5 Voltage of Alkaline Battery,2 Pcs Per Card 1.5V Alkalinity Batteries
PUJIMAX 4 Pcs/Card LR6 AA 1.5V Alkaline Battery Long Lasting Dry Cell for Household Appliances OEM ODM Bulk Supply CE Certified
Dongguan Puji Electronics Co., Ltd.🇨🇳CN6 yrs
Lr03 1.5 Volt Best Alkaline Battery 1.5v Aaa Lr03 Alkaline Batteries
Sino Technology Manufacturer Group Co., Ltd.verified🇨🇳CN5 yrs
PUJIMAX Hot Sales 4Pcs 1.5V AA Rainbow Alkaline Battery Not Rechargeable Single Use Battery Packs for Fingerprint Lock Toy
Dongguan Puji Electronics Co., Ltd.🇨🇳CN7 yrs
Factory Direct Supply 1.5V AAA Alkaline Rechargeable Batteries High Capacity Suitable for Toys/Remote Controls
Alkaline Power AA Batteries (LR6)-1.5V High-Energy 10-Year Leak Protection Chargeable for Consumer Electronics
Yongzhou Picell Electronics Co., Ltd.🇨🇳CN13 yrs
Eunicell 1.5V Alkaline Battery 625A PX625 LR9 A625 V625 PX625A PX13 V625U for Watch Camera Pen
East(shenzhen) Technology Co., Ltd.🇨🇳CN9 yrs
1.5v Aa Alkaline Batteries Lr6 2.7wh 360mins Primary Cell Wholesale Manufacturer Factory Supplier No.5 Alkaline Battery
Yiwu Chuangneng Battery Co., Ltd.🇨🇳CN4 yrs
PICELL Hight Quality OEM AA AAA LR03 LR6 Size Battery China Factory Supplier Wholesale 1.5v Alkaline Battery
Shijiazhuang Yunli Trading Co., Ltd.🇨🇳CN2 yrs
Vinnic Alkaline Batteries 1.5V 625 / EPX625G / LR9 / L1560-5 Pack
Hunan Hualai Technology Co., Ltd.🇨🇳CN7 yrs
KC Certificate Alkaline Battery AA Super Alkaline Battery AA LR6 1.5V
Zhejiang Yonggao Battery Co., Ltd.🇨🇳CN23 yrs
High Energy FOREWELL Alkaline Battery LR6 AA 1.5V Stable Discharge for Remote Control & Flashlight Bulk Wholesale
CIXI FOREWELL ELECTRONICS CO., LTDverified🇨🇳CN1 yr
LR06 AA1.5V ultra Alkaline Primary Dry Battery
Shenzhen Jbwcell Battery Co.,ltd🇨🇳CN9 yrs
1.5v Battery LR6 1650mAh Double AA Battery Digital Alkaline Battery for Remote Control Toys and Consumer Electronics
Wuxi Baojie Battery Co., Ltd.verified🇨🇳CN1 yr
High Quality 1.5V Alkaline Zinc Manganese AA AAA Batteries for Remote Control & Toys Metal Shell Primary Battery
Henan Chaoli New Energy Co., Ltd.verified🇨🇳CN7 yrsHigh Quality 1.5V Alkaline Zinc Manganese AA AAA Batteries for Remote Control & Toys Metal Shell Primary Battery
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Sources & References
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Equivalent of 1.4v mercury batteries? : r/AnalogCommunity
Reddit · r/AnalogCommunity
I have a Canon Datematic, and the manual states that it requires either Mallory RM640/RM640H, or Everready E640/E640E. Not sure what to do. Thanks for the help.
RM640 Alkaline Battery
24Hour Batteries
RM640 Battery is compatible with the following models: RM640, MR52, PX640A, 1126MP, EN640A, V640PX, 960-0374, PX640AB, RM640R, PC640A, A640PX, ...
1.5 Volt 350 mAh Mercury Battery Replacement
Battery Mart
Voltage: 1.5 Volt Capacity: 335 mAh Type: Alkaline. Also known as: 1126A, 1126MP, A640PX, E640N, EN640A, EPX640, EPX640A, H-N, LR52, MR52, NR52, PC640A, PX640, ...
Type 640 Mercury Battery Replacement
narkive
The 640 mercury cell was about 1.35V. The A640 akaline cell is about 1.5V. you can replace the 640 with an A640, which are fairly readily available. , from ...
Exell A640PX 1.5V Alkaline Battery PX640A EN640A ...
batteriesinaflash.com
Type: Alkaline Voltage: 1.5 V Diameter: 16.0 mm. Height: 11.2 mm. Also known as: PX640A / A640PX / EN640A / EPX640A / PC640A / LR52 / 1126A.
BAQI PX640 HM-N Camera Battery Adapter Converter for ...
Amazon.com
BAQI PX640 HM-N Camera Battery Adapter Converter for Vintage Film Cameras. Perfect Adapter for Yashica Electro GX and A675/LR44/SR44 Batteries.