笔者在维修中经常用到万用表,深感叠层9V电池因电压不足带来的误事。为此,到市场上购买两块雅格牌BP型复读机专用电源作个9V直流电源,加长引线焊上小鱼夹放在工作台面上,专供500型万用表R×10kΩ档和D F-830B数字万用表使用。该产品具有如下特点:(1)额定容量高达1200m Ah;(2)输 I often use multimeter in maintenance, deep stack 9V battery voltage caused by the misconduct. To this end, to the market to buy two Jacquard brand BP-type repeater dedicated power supply for a 9V DC power supply, lengthened lead welding on the small fish clip on the work surface, designed for 500 Multimeter R × 10kΩ file and D F- 830B digital multimeter to use. The product has the following characteristics: (1) rated capacity of up to 1200m Ah; (2) lose