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Summary: Alkaline type batteries (eg. Energizer Max or Duracell) should be used and changed every 8-10 months as a rule of thumb.
If you are renting out the premise for short and long term stays, what you really need is a good quality digital lock that has only the bare essentials to deliver digital access convenience on a daily basis. This translates to the following guidelines:
What are our thoughts on bluetooth or smartphone NFC enabled digital locks? Or the add-ons that makes these locks accessible over the internet? We believe NFC and bluetooth enabled digital locks are mostly specific to certain use cases and generally does not apply to most home owners. In other words, you are paying more than what you (really need). Those features are there to allow a smaller footprint (but passing on the footprint so to speak to your phone which you must not carry with you). We believe pin number access is the most important and to require a phone to unlock is all too impractical in real life. On the internet-enabled locks, you must be an early adopter because you are subjecting yourself to any security holes that is always present in early implementations (ie now) that allows hackers to (very) simple unlock from a non-trusted source.
Ultimately, for the majority of us, not paying for what we don't need is a practical approach to choosing the right digital lock that delivers maximum value at the lowest price point.
You can't go wrong with Gateman A20-FD digital lock because it simply (and consistently) works and it looks great with a ultra slim front profile and time-tested matt black front touch panel surface. More importantly, it comes at an affordable price for a very well built digital lock and with great attention to details from a double action Open button for added security and a hidden (slide out) 9V battery terminals for that elegant zen-like look. It is not your budget range cheaply built lock. This one exudes quality in both feel and looks.
The Gateman A20-FD digital lock is a pin and card access digital lock - we like it that way while some may have strong preference for a fingerprint enabled lock (see Gateman Z10 in an earlier blog post). While fingerprint model such as Gateman Z10 digital lock is preferred by many, not all our fingerprints can be scanned well especially when we pass a certain age (~ 60 years of age) or when our fingerprints are just not great with fingerprint scanning ( too dry or too fine fingerprint lines, ~ 5% of the population). If you have an elderly staying at the premise, any difficulty with remembering pin number (or the regular changes of pin number) and fignerprint scanning difficulty means one should forego a fingerprint model. The cards option (or in the various form factors such as stickers, stringed tags, key chain rings) may provide a more familiar proxy for the physical keys they are familiar with. Going with a pin/card model like the Gateman A20 digital lock is a practical no-nonsense approach of creating value for digital access convenience for all members of the family.
RFID form factors can be stringed RFID tags, wallet / credit card size, key chain ring and sticker formats. We have an interesting use case of an 'uncle' who never locks the rear exit door and would never use pin number. But a Gateman A20 that automatic locks when the door closes after him and an RFID sticker pasted on his cigarette lighter (that is always with him) addresses the situation well.
Check Products --> Accessories page for various RFID form factors.
Our customer engagements are short and sweet, and also characterized by professionalism and accuracy. We have been using Xero Accounting software for a while now and we find it a pleasure to use. What we like about Xero is the simplicity in setup (in the cloud which means no server software is needed), ease in access by our staffs no matter where they are and what they use - be it a desktop, a mobile or a tablet. Our interaction with our Singapore digital door lock customers has been professional and prompt using Xero's quote and invoice sales tool. Xero has also just announced availability of integration with UOB bank for bank reconciliation purpose - which we look eagerly to use. [Update Aug 31, 2016: The integration is in effect!]
We believe our Singapore digital door lock customers will find it easier than ever to engage us for digital door lock deployments!
Our thoughts on Singapore digital door locks.