Who makes charmast? Amazon sales, products and sellers
Updated November 2026 with September 2026 data
At a glance
- Size
- Large
- $2.0M est./mo
- Trend
- Declining
- -19%, last 2 vs prior 2 months
- Ratings
- Strong
- 4.4 ★ · 17,054 reviews
- Who sells it
- Mostly one seller
- Top seller has 100% of units
charmast estimated monthly revenue on Amazon
Our read on charmast
charmast is a large brand in Portable Power Banks, within Cell Phones & Accessories. It ranks 4 of 318 brands in that category and holds an estimated 4% of category revenue. Estimated revenue was $2.0M in September 2026, up 27% from $1.6M in June 2026, though the trend is labeled declining, with a change of -19% over the last 2 months. The brand sold an estimated 74,000 units in the latest month across 38 products. Its top listing sells an estimated 13,000 units per month. The average rating is 4.4 across 17,054 reviews. One seller, Chen Ying Ke Ji, accounts for 100% of units. The record covers 4 months of data.
Top charmast products on Amazon
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| Product | Rating | Est. units/mo | Amazon link |
|---|---|---|---|
| charmast Portable Charger Power Bank with Reinforced Built-in 4 Cables | 4.4 ★11,029 reviews | 13,000 | Check price on Amazon |
| charmast Power Bank Portable Charger with Reinforced Built-in 4 Cables | 4.4 ★10,968 reviews | 6,800 | Check price on Amazon |
| charmast Portable Charger Power Bank Built in Cables,10000mAh Battery | 4.5 ★948 reviews | 2,700 | Check price on Amazon |
| charmast Portable Charger Built-in Cables, 20000mAh Power Bank | 4.6 ★1,507 reviews | 2,400 | Check price on Amazon |
| charmast Portable Charger Built-in Cables, 10000mAh Slim Power | 4.4 ★819 reviews | 1,400 | Check price on Amazon |
| charmast Portable Charger Power Bank 10000mAh with Built-in AC Wall | 4.4 ★947 reviews | 650 | Check price on Amazon |
| charmast 20000mAh Portable Charger with Built-in Cables and AC Wall | 4.2 ★257 reviews | 550 | Check price on Amazon |
| charmast Mini Portable Charger USB-C Connector | 4.3 ★588 reviews | 440 | Check price on Amazon |
| charmast Portable Charger Built-in Cables, 20W Fast Charging | 4.4 ★825 reviews | 160 | Check price on Amazon |
| charmast 2 Pack Portable Charger | 4.5 ★134 reviews | 11 | Check price on Amazon |
Who sells charmast
- Chen Ying Ke Ji100%
Share of estimated units sold in September 2026, by the seller holding the Buy Box.
Place in its category
#4 of 318
Rank 4 of 318 brands in Portable Power Banks by estimated revenue in September 2026, with 4% of the category.
Frequently asked questions
Who makes charmast?
charmast is the brand name on 38 products we tracked on Amazon in September 2026 mostly in Portable Power Banks (Cell Phones & Accessories). The largest seller of charmast products that month was Chen Ying Ke Ji, with 100% of estimated units. Amazon listings don't show the brand owner's legal name, so the brand's own website is the place to confirm its parent company.
How much does charmast sell on Amazon?
charmast sold an estimated $2.0M on Amazon in September 2026, about 74,000 units. That is +27% compared with June 2026. These are Ecominsights estimates, not figures reported by the brand.
What are charmast's best-selling products on Amazon?
By estimated units sold in September 2026: 1. charmast Portable Charger Power Bank with Reinforced Built-in 4 Cables (about 13,000 units); 2. charmast Power Bank Portable Charger with Reinforced Built-in 4 Cables (about 6,800 units); 3. charmast Portable Charger Power Bank Built in Cables,10000mAh Battery (about 2,700 units).