These types of battery can leak a strong acid, which eats through clothing, carpet, or in some cases even metal. Approach it with protective gloves and face shield, and cover liberally with baking soda, until newly added baking soda does not cause additional fizzing or bubbling. Clean up remaining residue using a thick paste made from baking soda and water. Also pour baking soda into the trash bag containing the damaged battery. For alkaline batteries, dip a cotton swab in vinegar or lemon juice, and swab the spill to neutralize the basic leak. Use an old toothbrush dipped in the same material to scrub at a spill that has dried. Water can cause further corrosion, so wet a paper towel as lightly as possible and use that to wipe up the acid. Repeat until clean, then let the device dry for several hours. For lithium batteries, often used in cell phones or "button" batteries, immediately place the bag in a sealed, sturdy container, as it could cause a fire or explode. Any electric device exposed to the leak is no longer safe to use. Throw the device away, and clean up spills with water and nothing else. In some states and countries, you may dispose of alkaline batteries in the regular trash, but most batteries are required by law to be recycled. Visit earth911's online tool to find a nearby hardware store or other location that will recycle your type of battery. Some battery manufacturers may offer you a free or reduced-price replacement battery. If the battery was connected to a device when it leaked, the device's electrical contacts may need to be cleaned before the device can be safely used. Scrape off any residue using a plastic or wooden stick, and use a slightly damp paper towel to wipe it off, throwing the towel away immediately. If the contacts themselves are corroded, pitted, or discolored, file them down using sandpaper or a metal file, but be aware that they may need replacement.

TL;DR in Vietnamese:
Dùng muối nở để trung hòa dung dịch axit chì hoặc Ni-Cd. Vệ sinh dung dịch chảy ra từ pin akaline bằng axit nhẹ thường dùng trong nhà. Lau sạch axit chảy ra từ pin lithium bằng nước. Tiêu hủy pin. Vệ sinh phần tiếp điện (không bắt buộc).