How to Replace the Battery in a Blade Key?
3 Answers
Pull out the mechanical key from the smart key. Use the mechanical key to pry open the square hole. Remove the battery cover, replace the battery, put the cover back on, and reinsert the mechanical key.
With extensive experience in replacing blade key batteries myself, it's a simple few-step process: First, use a small screwdriver or coin to gently pry open the shell along the edge gap—avoid excessive force to prevent plastic clips from breaking. Inside, there's a small button battery, commonly the CR2032 model. Note whether the positive side faces up or down. After removing the old battery, align and place the new one correctly, pressing firmly on the contacts. Before closing the cover, clean any dust to prevent poor contact. After replacement, test the lock and unlock functions; if they don't work, reassemble. The battery typically lasts two to three years. Before it dies, the key's response will slow down—replacing it early saves money and hassle. A tip: use plastic pry tools to avoid short circuits caused by metal. Water exposure or high-frequency use can shorten the key's lifespan, so store spare batteries after replacement.
As a DIY enthusiast, I replaced the battery myself: Prepare a new CR2032 battery and a small Phillips screwdriver or plastic pry tool. Locate the gap at the bottom of the key, pry gently with your wrist to avoid scratches. Remove the battery compartment, check the positive/negative orientation before replacing; reassemble and test once to complete. Tools matter—avoid using hard objects that may damage the casing; buy branded batteries to prevent leakage. Keep two spare sets at home, clean internal contacts after replacement to prolong usage. Note: If malfunctions persist, it might indicate worn contacts or module failure—seek professional repair if DIY fails.
