The standard battery is a chemical battery. Because of its relatively stable electromotive force and good reproducibility, it has been used as a voltage standard internationally for a long time. Used as a standard auxiliary battery when measuring and calibrating the voltage of various batteries. According to the situation of cadmium sulfate solution in the battery, there are two types: saturated and unsaturated. At 20 ° C, the saturated electromotive force should be in the range of 1.0185-1.1868 volts; the unsaturated electromotive force should be in the range of F1.01860-1.01960 volts. The former is characterized by stable electromotive force and a large temperature F coefficient (temperature vs. electromotive force change); the latter has a small temperature coefficient and is easy to use. Generally for industrial and laboratory use. It was invented by American electrical engineer E. Weston in 1892, so it is also called Weston battery.

The battery test according to the IEC 60950 standard is also different for each country.

Product	Country	Certification items	standard test
Lithium battery	Global	UN38.3	ST/SG/AC.10/11/Rev.5-Section38-AmendIATA DGR
Battery	全球	SDS	OSHA GHS
Portable secondary cells and batteries	CB Member States	CB	IEC/EN 62133
Portable secondary cells and batteries	EU	IEC/EN Report	IEC/EN 60950
Lithium battery	North America	UL/cTUVus/ETL/CSA	UL 1642/UL E62133/CSA E62133
Household and commercial batteries	North America	UL/cTUVus/ETL/CSA	UL 2054/UL E62133/CSA E62133
Portable secondary lithium batteries and batteries	Korea	KC	KC 62133/K 62133
Lithium battery	Japan	PSE	MITI(1962:No.85)1st Clause：Appendix 9
Lithium batteries and batteries	Thailand	TISI	TIS 2217-2548(2005)
Lithium batteries for cellular phones	Brazil	ANATEL	Resolution #481
Lithium battery / battery	Russia	Cu - TR/EAC	IEC 62133 EN61000-6-1/3
Lithium battery / battery	Mexico	NOM	NOM-001-SCFI-1993
Battery	EU	CE	EN55022，EN55024，EN61000-6-1，EN61000-6-3
Battery / Portable Power Bank	India	BIS	IS16046
Battery	United States	FCC	Part 15B
Portable secondary cells and batteries	Taiwan	BSMI	CNS 15364
Portable secondary cells and batteries	China	CQC or Report	GB 31241

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