Nutool sf10 i have changed the combination number but still can't get in my safe --any suggestions

https://www.google.com/search?q=nutool+sf10+safe+manual

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notify manufacturer or a locksmith

A lock smith would be the best bet

The battery is located in the back of the door. Assuming that you can open the safe. There are videos on YouTube for opening the safe in the event of battery failure.

notify manufacturer or a locksmith

the best and less costly, use duct tape!

Yes. That seven digit number is the key code. A locksmith who is well stocked should be able to cut new ones from just the number.

Otherwise write to the manufacturer of the safe or the lock and provide the number and they should send the new keys.

in either case, there will be a nominal fee.

Try raising he temperature of the safe then try and open after an hour.

I need an instruction Manual for a Nutool sf20 safe

Open the safe door and press the s key press the I key twice then press the red button on the inside of door near the hinges. you will hear 2 long beeps. press the s key and then the red button and you will hear a beep enter your combination up to 12 numbers then press the E key your combination is now set. Best of luck