These people often have tingling and numbness in the feet as well. Many people complain that their feet are overly sensitive to touch (hyperesthesia) and can have varying degrees of burning pain. It can range from mild to disabling. Diabetes and alcohol abuse are by far the most common causes of neuropathy in the legs.
Q: what cause macbook pro battery swelling? Apple battery packs contain a set of 6 lithium Ion (Li-Ion) cells (the metal covered envelopes), connectivity circuitry, and a small logic board. The main cause for battery cell swelling is what is known as thermal runaway. If a cell reaches a certain temperature then a chemical in the cell (usually Cobalt Oxide for Lithium Ion batteries) starts an unintended reaction which is exothermic in nature (i.e. it creates heat).
Re: Swollen Batteries. use distilled water ALWAYS. Only use acid if a battery is weakening but cannot give you advice there. Acid will give them a jump start sort of speak and is used as a last alternative before declaring them dead. When you fill batteries, dont overfill by filling completely to the top. Leave about a 1/4 inch to leave space for natural gases that form in the battery.