劲量（Energizer）是著名的电池和手电筒品牌，总部位于美国密苏里州Town and Country，目前在美国的电池市场拥有近30%的占有率[来源请求]，其主要传统对手是金霸王。

劲量（Energizer）是世界上最大的电池和便携式照明设备的生产商，产品销往全球175个国家，仅在美国，劲量（Energizer）每天的销量就超过三百五十万粒，每三粒电池中就有一粒是劲量（Energizer）生产的。

为了配合劲量（Energizer）在全球的发展，亚太地区现拥有8个厂房，并于18个国家设立办事处。其中劲量（中国）有限公司（Energizer）也早在1992年开始进驻中国，并于1998年在天津设立生产工厂，更在北京、上海、广州设立分公司。

劲量（Energizer）始终引领着全球电池能源行业的发展，并致力于为消费者提供最便捷的电力支持。劲量（Energizer）及永备凭借其优良的品质和耐用的性能，正受到全球越来越多消费者的青睐。

The Energizer® brand is synonymous with world's first innovation and emerging technologies. We're leading and shaping the power and portable lighting categories with a powerful portfolio of groundbreaking products and consumer-led innovation.​​

Energizer is a global leader in the dynamic business of providing power solutions with a full portfolio of products including Energizer® brand battery products such as Energizer® EcoAdvanced™; Energizer MAX®; Energizer® Ultimate Lithium™; Energizer Recharge® batteries and charging systems; and portable flashlights and lanterns.

In 2016, Energizer acquired HandStands Holding Corporation, a leading designer and marketer of automotive fragrance and appearance products. HandStands offers innovative products from recognized brands such as Refresh Your Car!®, California Scents®, Driven®, Bahama & Co.®, LEXOL® and Eagle One®.