Lithium Batteries: For domestic mailings only, small consumer-type primary lithium cells or batteries (lithium metal or lithium alloy) like those used to power cameras and flashlights are mailable domestically under certain conditions.
Lithium Batteries: Only lithium cells and batteries that are properly installed in the equipment they are intended to operate may be sent internationally or to APO/FPO/DPO locations if not restricted or prohibited by the destination country. Lithium batteries packed with, but not installed in, equipment and lithium batteries sent separate from equipment are prohibited. Damaged or recalled batteries are prohibited and may not be mailed internationally under any circumstances.
Lithium-ion or Lithium Polymer (Rechargeable) Cells and Batteries
Small consumer-type lithium-ion or lithium polymer (rechargeable) cells and batteries like those used to power cell phones and laptop computers are mailable in a single shipment with the following restrictions（手机、笔记本的小型消费级锂电池可以邮寄）:
The batteries must be installed in the equipment they are intended to operate. 必须正确安装 。
Each shipment may contain a maximum of four lithium cells or two lithium batteries. 一个包裹最多两块电池。
The total Watt-hour rating (Wh) for each cell must not exceed 20 Wh per cell.
The total Wh for each battery must not exceed 100 Wh per battery. 单块电池最大容量不超过 100 Wh 。联想官网出售的笔记本电池容量范围是 23.5~96 Wh，容量最大的是这块巨无霸、 96 Wh 。
Each battery must bear the Wh marking on the battery to determine if it is within the limits defined in 135.64c and 135.64d.
The batteries installed in the equipment must be protected from damage and short circuit . 正确安装。
The equipment must be equipped with an effective means of preventing it from inadvertently being turned on or activated. 正确安装。
The equipment must be contained in a strong, sealed package and cushioned to prevent movement or damage. 正确安装、使用 Lenovo 原始包装。
Mailpieces must not bear markings or labels identifying the contents as lithium batteries. 外包装不能有锂电池标志，参见本文后面的这条评论。