Changes

* <span style="color:red;">You must read these safety instructions and warnings before charging your batteries. * <span style="color:red;">Lithium Polymer and Li-ion batteries are volatile. Failure to read and follow the below instructions may result in fire, personal injury and damage to property if charged or used improperly. * <span style="color:red;">Never make wrong polarity connection when charging and discharging battery packs. Always double check polarity of battery's connector to make sure "+" to "+" and "-" to "-". * <span style="color:red;">Do not mix and use old batteries and new batteries, or batteries with different brand names. * <span style="color:red;">Lithium batteries has it's cycle life, please replace old battery with new one when it reaches it's service life or when it is two year old, whichever comes first. * <span style="color:red;">When charging Battery Pack, please put battery in a fire proof container. Please don't leave the X728 on the wood material or carpet and unattended. * <span style="color:red;">Must keep the X728 away from children. *Please watch Main Video and Tutorial Video regarding 18650 batteries at: https://www.staysafebattery.com/en/

<span style="color:red;font-weight:bold">X728 18650 UPS + Power management board</span>

* 18650 two cells lithium Ion holder* Can work with [[X728#X728-A2|X728-A2 ]] stackable 2-cell battery holder to increase battery capacity

 

* Integrated Hardware DS1307 Real Time Clock (RTC) with Battery Back-Up

* Recharge Threshold : 4.1V <span style="color:red;font-weight:bold">Note: * <span style="color:red;font-weight:bold">Do not apply power to your Raspberry Pi via the Micro USB socket or Type-C socket.* <span style="color:red;font-weight:bold">Do not use 18650 battery with built-in protection circuit

* Jumper link Pitch 2.54mm x 3 ==X728-A1== <span style="color:red;font-weight:bold">X728-A1 Optional Raspberry Pi cooling fan</span>* Completely solve the overheating problem of your Raspberry Pi* Efficient drop temp of your Raspberry Pi by using the X728-A1* Stackable design allows you to connect both X728 and X728-A1on your Raspberry Pi* On-board XH2.54 power output connectors allow to power other devices* Reserves the 40-pin header that can be stacked with other Raspberry Pi accessory boards* '''X728-A1 supports [[X750]]/[[X758]] also.'''

==DocumentX728-A2==<span style="color:red;font-weight:bold">X728-A2 Optional 18650 2-Cell battery holder</span>* Stackable 18650 two cells lithium Ion holder* Ideal solution to increase battery capacity* Integrated battery protection circuit ==User manual==* [[x728-Software]]* [[x728-hardware]]