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Ships within 48 hours · Estimated delivery Jul 6 - Jul 11
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Description
O.P.S Competition packs D/S 5600mah 7.4 (2s2p)Specification details are below. Size: 21mm x 42mm x 136mm Measured MAh: 5600mAh Voltage: 7. 4v C rate: 90 180 Weight: 280gr Wire size: 7AWG Finally, if you want your batteries to have a good life cycle think about your charging system and your monthly process. Advised to charge rate of 1C to 5C please note that a higher charge rate will put less mAh into the pack and will reduce cycle life. Speed run packs do not come with a warranty, the more we
Specification details are below.
Size: 21mm x 42mm x 136mm
Measured MAh: 5600mAh
Voltage: 7.4v
C rate: 90/180
Weight: 280gr
Wire size: 7AWG
Finally, if you want your batteries to have a good life cycle think about your charging system and your monthly process.
Advised to charge rate of 1C to 5C please note that a higher charge rate will put less mAh into the pack and will reduce cycle life.
Speed run packs do not come with a warranty, the more we push our system we push our motors esc and batteries.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.9 ★★★★★
Based on 1782 reviews
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Product Reviews
★★★★★ 4
Works Great but the price is rising!
Anua Azelaic Acid is a very good serum. Both my daughter and I use it regularly. My daughter has severe rosacea, and this has helped calm her skin significantly her redness is almost gone. For me, it has also made a noticeable difference by reducing redness and giving my skin a healthy glow. We both use it at night, and it’s definitely very soothing and calming. The formula is gentle, lightweight, and works really well for sensitive skin without causing irritation.
However, the only downside is the price, it seems to have increased quite a bit recently, which is concerning. I bought a couple during Amazon Prime Day, which worked out really well. For a relatively simple azelaic acid serum, the price increase feels a bit steep.
If the price continues to rise, I may need to look for a more budget-friendly alternative. Otherwise, it’s a really great serum that delivers great results.
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Reviewed in the United States on March 30, 2026
★★★★★ 5
DERM APPROVED!
I am obsessed with this product!! This feels very luxurious on my skin and does not pill like other products I have had in the past. I have noticed a significant improvement in the background redness in my skin. As someone who works in derm and values good ingredients and products that actually work... I can confidently say that this is the best OTC azelaic acid product I have tried out. It sits very nicely under my moisturizer and does not dehydrate my skin like other azelaic acid products have done in the past. HIGHLY RECOMMEND
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Reviewed in the United States on May 10, 2026
★★★★★ 5
A Game Changer for Sensitive Skin
I use this serum every single day, and it has become one of the most important products in my skincare routine. I have very sensitive skin and cannot tolerate stronger active ingredients such as retinol or high-strength acids, so finding something effective but gentle has been incredibly important.
This serum has helped calm redness, reduce inflammation, and noticeably improve my skin’s overall appearance and comfort. After dealing with a prolonged inflammatory skin condition, this product made a significant difference and helped restore my skin barrier.
The formula feels soothing, hydrating, and non-irritating. If you have sensitive or reactive skin and are looking for a gentle product to help with redness and uneven texture, I highly recommend giving this serum a try.
Photos attached: The green bottle is the product and the second photo includes my favorite additions.
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Reviewed in the United States on May 13, 2026
★★★★★ 5
Perfect for Acne-Prone Skin!
This serum has honestly been a great addition to my routine for redness and post-acne marks. The texture is lightweight, hydrating, and doesn’t feel sticky or heavy on my oily/acne-prone skin.
I have sensitive skin with a focus on barrier protection, and this didn’t irritate my skin at all. It layers beautifully with the rest of my skincare and leaves my skin looking calmer and smoother over time. AND, it doesn’t have a smell!!
Definitely one of my favorite azelaic acid serums I’ve tried.
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Reviewed in the United States on May 18, 2026
★★★★★ 5
6-Month Update: Still a staple for sensitive, acne-prone skin
Size: 3.38 Fl Oz (Pack of 1), Size: 3.38 Fl Oz (Pack of 1)
I originally reviewed this ampoule when I first started using it, and now after about six months of consistent use (morning and night), I feel confident giving a more long-term update.
I have sensitive, acne-prone, combination skin, and this has remained one of the most reliable products in my routine. The texture is still one of my favorite things about it — very lightweight, absorbs quickly, and layers well under moisturizer and sunscreen without pilling.
Over time, I’ve noticed:
Less visible redness
More balanced oil production in my T-zone
Fewer irritation flare-ups when introducing new products
No clogged pores or breakouts from this formula
It doesn’t feel heavy or sticky, even in humid weather. I’ve continued repurchasing and even keep it on subscription because it consistently performs without causing sensitivity.
If you’re looking for a gentle, soothing centella product that works well for long-term barrier support, this has proven to be a dependable option in my experience.
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Reviewed in the United States on December 9, 2025
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