If something changes in one part of the family, other. parts will need to adjust as well. In addition, the family is part of other systems in. the community, so changes in one family will create imbalance and lead to changes. in other systems that surround that family.
The Fitbit Surge comes equipped with a rechargeable battery made of lithium-polymer. It takes roughly about 1 â 2 hours to charge a Surge fully. Fitbit Surge has the longer battery life of 7 days per charge than other Fitbit products.
The Fitbit Charge HR is Fitbit's latest big fitness move: it adds heart-rate tracking, something tons of bands and trackers have started adopting. It tracks heart rate 24 hours a day, even when you sleep. It syncs everything to your phone. It still looks like the older Fitbit bands, but it does more.arah Tew/CNET. For $20 more than the non-heart-rate-tracking Fitbit Charge, this seems like a no-brainer ($150 versus $130 for the Charge in the US; in the UK, it's Â£120 versus Â£100, or $180 versus $150 in Australia).