Does this watch need a battery?

No. The E111 Eco-Drive movement charges from any light and runs about six months on a full charge. An insufficient-charge warning tells you when it needs light.

Is it safe to swim with?

Yes. It is rated 100 m (10 bar), which covers swimming and snorkeling, but not scuba diving.

What size is the case?

It is 41 mm across and 9.7 mm thick, with a 22 mm lug width for strap swaps.

Is the crystal sapphire?

No. It uses mineral crystal, which resists knocks but scratches more easily than sapphire.

Is $245.71 a good price?

It is the lowest new price among the five stores listing it as of November 5, 2026, and sits at the low end of its recent range.

The watch on its steel bracelet, a Citizen box and paperwork, and a three-year warranty.

Where is the Citizen Eco-Drive BM7637-81H Men Watch cheapest?

At Walmart, for $245.71, as of our latest check.

What do buyers say about the Citizen Eco-Drive BM7637-81H Men Watch?

Rated 4.5 out of 5 from 4 ratings.

Where can I buy the Citizen Eco-Drive BM7637-81H Men Watch?

13 stores we checked sell it, including Walmart, eBay, Spot On Times, Stylessence Fine Jewellery, Ducci Jewellers.

Citizen Eco-Drive BM7637-81H Men Watch

Best price now

$245.71at WalmartObserved at 9:46 PM

Compared across 5 stores. Prices are checked against each store and labelled with when.

Visit Walmart

Citizen Eco-Drive BM7637-81H Men Watch

Best price now

$245.71at WalmartObserved at 9:46 PM

Compared across 5 stores. Prices are checked against each store and labelled with when.

Visit Walmart

Ask our agent about this product

It checks today's price at every store, compares the alternatives and answers in about a minute.

Our take on the Citizen Eco-Drive BM7637-81H Men Watch

The Citizen BM7637-81H is a 41 mm stainless steel dress watch with a gray dial, date window and Citizen's E111 Eco-Drive movement, which runs on any light source and holds a charge for about six months. It is slim at 9.7 mm thick, rated to 100 m, and comes on a steel bracelet with a push-button fold-over clasp. At $245.71 at Walmart as of November 5, 2026, it sits at the low end of its recent range, with five stores listing it new.

Best forBuyers who want a set-and-forget watch with no battery changesOffice and smart-casual wearShoppers wanting a slim steel watch under $300Gift buyers who want a low-maintenance everyday watch

Pros

Eco-Drive solar movement needs no regular battery replacement
Slim 9.7 mm case slips under a shirt cuff
100 m water resistance covers swimming and daily wear
Date window and clean three-hand gray dial
Three-year warranty

Cons

Mineral crystal scratches more easily than sapphire
No radio-controlled timekeeping or lume mentioned
Steel bracelet and 140 g weight feel heavy to some
Basic E111 movement with no extra complications

Citizen Eco-Drive BM7637-81H Men Watch prices at every store

WalmartNew
In stockSold by Perfect Deals
$245.71+ $9.99 shippingObserved at 9:46 PM
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Spot On TimesNew
In stockReturn policy
$262.00Observed at 9:46 PM
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Stylessence Fine JewelleryNew
In stockReturn policy
$281.00Observed at 9:46 PM
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Ducci JewellersNew
In stockReturn policy
$281.00Observed at 9:46 PM
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eBayNew
In stockSold by onlineshopingmall
$360.95Free shippingObserved at 9:46 PM
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Citizen Eco-Drive BM7637-81H Men Watch price history

Lowest price we've seen: $245.71 on Nov 6 at Walmart. Tracked across 5 stores since Nov 6.

What reviewers say

Owners of Citizen Eco-Drive steel watches generally report reliable timekeeping and long service life with no battery swaps.

What people mention

BatteryPraisedOwners like never having to replace a battery, since light keeps the E111 charged.
BuildMixedThe steel case and bracelet feel solid, but the mineral crystal is seen as a weak point.
FitPraisedThe 41 mm case and 9.7 mm thickness wear comfortably on most wrists.
WeightMixedAt 140 g some wearers find the steel bracelet heavy on the wrist.
LegibilityMixedThe gray dial reads clearly in daylight, but there is no lume for dark settings.

About the Citizen Eco-Drive BM7637-81H Men Watch

Calibre no.

E111

Maximum run time from full charge

(Normal Use Condition)

Approximately 6 months

Movement

Eco-Drive

Signal Reception

Without Radio Reception Function

Case Metarial

Stainless steel

Glass Material

Mineral Glass

Band Material

Stainless Steel

Water Resistance

100m

Case Size

Thickness: 9.7mm

Diameter:41mm

Warranty

3 years warranty

Specifications

Date Display

Specifications

Case Diameter: 41 mmSource
Case Material: Stainless SteelSource
Dial Color: GraySource
Lug Width: 22 mmSource
Band Material

Questions and answers

Does this watch need a battery?: No. The E111 Eco-Drive movement charges from any light and runs about six months on a full charge. An insufficient-charge warning tells you when it needs light.
Is it safe to swim with?: Yes. It is rated 100 m (10 bar), which covers swimming and snorkeling, but not scuba diving.
What size is the case?: It is 41 mm across and 9.7 mm thick, with a 22 mm lug width for strap swaps.
Is the crystal sapphire?: No. It uses mineral crystal, which resists knocks but scratches more easily than sapphire.
Is $245.71 a good price?: It is the lowest new price among the five stores listing it as of November 5, 2026, and sits at the low end of its recent range.
What is in the box?: The watch on its steel bracelet, a Citizen box and paperwork, and a three-year warranty.
Where is the Citizen Eco-Drive BM7637-81H Men Watch cheapest?: At Walmart, for $245.71, as of our latest check.
What do buyers say about the Citizen Eco-Drive BM7637-81H Men Watch?: Rated 4.5 out of 5 from 4 ratings.
Where can I buy the Citizen Eco-Drive BM7637-81H Men Watch?: 13 stores we checked sell it, including Walmart, eBay, Spot On Times, Stylessence Fine Jewellery, Ducci Jewellers.