Ask Sail: Zinc-Air Batteries

I am racing an ultralight sailboat in a three-day regatta. I am counting every ounce that comes on board, and a conventional wet-cell or AGM battery will put me over my weight limit. Is there any new battery technology I can use?
Author:
Publish date:
Social count:
0
Zinc-Air-Batteries

Ben Hatheway of New York, New York, asks:

I am racing an ultralight sailboat in a three-day regatta. I am counting every ounce that comes on board, and a conventional wet-cell or AGM battery will put me over my weight limit. Is there any new battery technology I can use to keep my electronics running, including my nav lights at night?

Gordon West replies:

You might want to check out a new, very powerful lightweight zinc-air battery system. Zinc-air batteries are used throughout the world on many sea buoys, and are now being built for recreational use. I just witnessed sea trials of a 275AH zinc-air battery that is capable of delivering up to 12 amps of continuous current. It weighed just 27.5 lbs and yielded eight times the stored energy per kilogram of a deep-cycle lead-acid battery.

Zinc-air batteries are not rechargeable, but they have replaceable zinc “power cartridges” that can be safely thrown out with your household trash. These make up the anode side of the battery; the air we breathe acts as the “fuel” for the cathode side. After installing a power cartridge, you pull the tab covering the internal air holes and within seconds you’ll have a fresh 12-volt source. QuantumSphere now manufactures a wide range of zinc-air portable power products.

Got a question for our experts? Send it to sailmail@sailmagazine.com

Related

01-Hanse_Emotion_6

Hanse’s E-Motion Electric Rudder Drive

When news that Hanse Yachts had launched a new form of electric-powered yacht first broke in the winter of 2016, it was widely reported. After all, Hanse is one of the world’s biggest builders of sailing boats, so this had the feeling of a breakthrough to it.After nearly a year, ...read more

TOTW_PromoSite

SAIL's Tip of the Week

Presented by Vetus-Maxwell.Got a tip? Send it to sailmail@sailmagazine.comDefusing the Run It’s been said with justification that gentlemen don’t boast about how windy it was, but the shape of my ensign in the photo will give well-informed readers a fair idea. They will also ...read more

01b-Over-Loch-Scavig

Cruising Across the North Sea

Conventional wisdom says sleeping in the V-berth while offshore is a bad idea. It can be like a diabolical amusement ride that tosses a sailor to and fro, inducing stomach-churning weightlessness. And yet, here I am, nestled in the tilted corner created by my berth and the ...read more

GG17-SAONA47-DX0796

Boat Review: Fountaine Pajot Saona 47

Here’s a riddle: What is less than 50ft long, has two hulls, three big cabins and four decks? Answer: The Fountaine Pajot Saona 47. In fact, it may even be five levels if you count the large engine rooms. This boat is a “space craft” in every sense of the word.DESIGN & ...read more

RichardBennettMIDNIGHT-RAMBLER3249x202

Storm Sails: Do you Need Them?

Many sailors embarking on ocean passages will take along the obligatory storm jib and trysail, with the vague idea that they may come in handy. Few sailors, however, have a real understanding of how and when to set them.It doesn’t help matters when we hear from seasoned sailors ...read more

IntheWater(1)

Boaters University Unveils Rescue Course

Boaters University has just announced its latest online course, Safety & Rescue at Sea, taught by Mario Vittone, whose name you might recognize from the pages of our sister publication, Soundings Magazine and his Lifelines blog.Mario Vittone is a retired U.S. Coast Guard rescue ...read more

IMG_20170920_132819

How to: Installing New Electronics

I had been sailing my Tayana 42, Eclipse, for a few years without any installed electronics on board. I’d gone pretty far up and down the New England and Mid-Atlantic coasts with paper charts, the Navionics app on my Android phone, a hand-bearing compass and the ship’s compass. ...read more