Check the listing for details. NEW Segway Ninebot ES1, ES2, E22, E25A External Battery - W/Mounting Bracket. Condition: New. Listed at 195.00 USD. Segway Ninebot ES2 ES4 External Battery - 187wh - New Complete with screws, bracket, and tools - Everything you need! A worth while upgrade for sure. Will work with the following models: - ES1 - ES2 - ES4 - E22 & E25A This is for a new OEM Segway Ninebot ES2 and ES4 External battery pack. These are unused but have been removed from the box for charging. This will make the es4 faster and double it’s range. Comes with everything needed to attach it to the es4. This is an original part, not an aftermarket battery. Don’t hesitate to ask any questions! - 36v - 187whSegway Ninebot ES2 ES4 External Battery - 187wh - New Complete with screws, bracket, and tools - Everything you need! A worth while upgrade for sure. Will work with the following models: - ES1 - ES2 - ES4 - E22 & E25A This is for a new OEM Segway Ninebot ES2 and ES4 External battery pack. These are unused but have been removed from the box for charging. This will make the es4 faster and double it’s range. Comes with everything needed to attach it to the es4. This is an original part, not an aftermarket battery. Don’t hesitate to ask any questions! - 36v - 187wh