The paper introduces the composing and test theory of VRLA storage battery internal resistance.
介绍阀控铅酸（VRLA）蓄电池内阻的组成、测试原理和方法。
The VRLA storage battery is wide used in post and telecom system, The technique of detecting VRLA storage battery is much complex then that of detecting open type one's.
就邮电系统及供电系统广泛使用VRLA阀控密封铅酸免维护蓄电池，由于该蓄电池的检测技术相对于开放式蓄电池更为复杂。
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