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expiredLovelyCheetah | Staff posted Nov 11, 2025 12:49 AM
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expiredLovelyCheetah | Staff posted Nov 11, 2025 12:49 AM

2-Count 7500mWh HW USB Rechargeable D Cell Batteries $6.99 + Free Shipping w/ Prime or $35+ orders

$6.99

$15

53% off
Amazon
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TIGER HEAD HI WATT BATTERY HK CO LTD via Amazon [amazon.com] has the 2-Count 7500mWh HW USB Rechargeable D Cell Batteries for $9.99 - $3 w/ code HLDBJS97 at checkout = $6.99. Shipping is free w/ Prime or $35+ orders.
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TIGER HEAD HI WATT BATTERY HK CO LTD via Amazon [amazon.com] has the 2-Count 7500mWh HW USB Rechargeable D Cell Batteries for $9.99 - $3 w/ code HLDBJS97 at checkout = $6.99. Shipping is free w/ Prime or $35+ orders.

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Nov 11, 2025 03:20 AM
31 Posts
Joined Sep 2013
KayahanSNov 11, 2025 03:20 AM
31 Posts
My heatilator fireplace works with these. Ordering 1 pair if there is power outage I can use the fireplace for space heating.
Nov 11, 2025 03:53 AM
66 Posts
Joined Oct 2009
SS109Nov 11, 2025 03:53 AM
66 Posts
Code works for multiples. Thanks!
Nov 11, 2025 05:19 AM
789 Posts
Joined Nov 2011
adtruckNov 11, 2025 05:19 AM
789 Posts
For the size of a d cell, the capacity should be way more than 7500mwh. A 21700battery is smaller and have 14800mwh capacity. So I suspect this d cell rechargeable is just three aa lithium battery in a d size shell.
1
Nov 11, 2025 05:36 AM
5,880 Posts
Joined Nov 2013
ROB.E.REINNov 11, 2025 05:36 AM
5,880 Posts
Quote from adtruck :
For the size of a d cell, the capacity should be way more than 7500mwh. A 21700battery is smaller and have 14800mwh capacity. So I suspect this d cell rechargeable is just three aa lithium battery in a d size shell.
hence the price?
2
Nov 11, 2025 05:58 AM
1,164 Posts
Joined May 2006
zephyrprimeNov 11, 2025 05:58 AM
1,164 Posts
Quote from ROB.E.REIN :
hence the price?
21700's are the same price (and a lot less in bulk). There just aren't any good rechargeable D cells at a decent price tho so for some people, they might have use for these.
Nov 11, 2025 12:21 PM
2,325 Posts
Joined Oct 2011
MWinkNov 11, 2025 12:21 PM
2,325 Posts
Quote from KayahanS :
My heatilator fireplace works with these. Ordering 1 pair if there is power outage I can use the fireplace for space heating.
Keep in mind that this type of battery usually has a high self-discharge rate. If relying on them for emergencies, make sure to charge them regularly.
Nov 11, 2025 12:55 PM
4,510 Posts
Joined Nov 2013
luckydog97Nov 11, 2025 12:55 PM
4,510 Posts

Our community has rated this post as helpful. If you agree, why not thank luckydog97

Don't buy these. They're Chinese junk.

Buy AA to D parallel adapters and use rechargeable eneloops.

They're more reliable, higher capacity, just a swap when depleted rather than a slow charge, and can be used with disposables in an emergency.

Thank me later.
2

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Nov 11, 2025 05:03 PM
17 Posts
Joined Nov 2018
JohnF9939Nov 11, 2025 05:03 PM
17 Posts
Quote from luckydog97 :
Don't buy these. They're Chinese junk.Buy AA to D parallel adapters and use rechargeable eneloops.They're more reliable, higher capacity, just a swap when depleted rather than a slow charge, and can be used with disposables in an emergency.Thank me later.
Thanking you now. These adapter are great!
Nov 11, 2025 07:00 PM
3,209 Posts
Joined May 2006
FarmeroakNov 11, 2025 07:00 PM
3,209 Posts
Quote from luckydog97 :
Don't buy these. They're Chinese junk.

Buy AA to D parallel adapters and use rechargeable eneloops.

They're more reliable, higher capacity, just a swap when depleted rather than a slow charge, and can be used with disposables in an emergency.

Thank me later.
+1 on this route
Nov 11, 2025 11:05 PM
1,055 Posts
Joined May 2006
lchen5Nov 11, 2025 11:05 PM
1,055 Posts
For a such size battery. I wish it can delivery more juice. At least 10000MWH.
These days portable battery with this size volume can give us 15000-20000mah easily.
1

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