Sony Recalls NP-F550 and NP-F570 InfoLithium batteries bought after March 1999 due to evidence of a very small percentage (3 out of 415,000) overheating and smoking during recharge, these batteries are used on a variety of devices including the Sony Mavicas and D700 / D770. If you've bought either of these InfoLithium batteries since March 1999 should check the dedicated Sony website or call a toll free number (U.S.) to check their battery.

Sony BatteryRecall webpage

Or call Toll Free 1-800-710-9026