We also promote batteries for 12V apparel but due to stronger effectiveness, the batteries are bulkier than 7V batteries and don't last as long as 7V batteries on only one charge. Currently’s market features An array of choices. They do not, even so, have the same attributes or Advantages. https://volt-heated-vest-review81481.digitollblog.com/31586124/the-2-minute-rule-for-who-makes-voltex-heated-vest