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LH600SKN: Add-on Digital Door Lock for Wooden Door Lock
Our tips to prolong the life span of your digital lock:
1) Use only ALKALINE batteries (recommended Energizer)
2) Do not use rechargeable batteries or mix new batteries with old batteries
3) Change batteries after 6 months to prevent batteries leakage
4) Install door closer to prevent your door from slamming, otherwise, warranty will be void