How We Research
We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-09-30 · 7 min read · Independent comparison
If you want a fun, full-body silicone skin for your AirPods 4 charging case — plus a cleaning pen thrown in — choose XMBYGY Pen Case; if you need a structured, hard-shell travel case that keeps a JBL Endurance Peak 3 charging case and its cables organized and dust-free, choose RLSOCO Case.
• XMBYGY Pen Case — biggest strength: three silicone cartoon skins in one package, plus a 3-in-1 cleaning pen, giving you color variety and a full-body soft cover for the AirPods 4 charging case.
• XMBYGY Pen Case — biggest trade-off: it fits AirPods 4 (2024) only, and it's a skin, not a hard shell, so it's about everyday bump protection and style rather than crush resistance.
• RLSOCO Case — biggest strength: a hard EVA and polyester shell with a mesh pocket, tongue strap and velvet lining that separates your JBL earbuds from their charging case and cables.
• RLSOCO Case — biggest trade-off: it's built specifically for the JBL Endurance Peak 3, so it won't fit other earbuds, and the earbuds are not included.
• Who each pick is for: XMBYGY for AirPods 4 owners who want cute, protective skins and a cleaning tool; RLSOCO for JBL Endurance Peak 3 owners who want one organized, hard-shell home for travel.
The XMBYGY Pen Case is a silicone cover set for the AirPods 4 charging case, and the headline feature is simply how much you get: three separate silicone cases in NUT, FSL and Toast colorways, each molded in a cartoon theme. That's three looks for one charging case, which matters if you get bored of a skin fast or want to match different bags and outfits. The silicone is soft, so it wraps the charging case snugly without scratching it, and the description notes it won't loosen or deform over long-term use.
The second piece in the box is the 3-in-1 cleaning pen, with a flocking sponge, a soft brush and a metal pen tip. That's a genuinely useful add-on for earbuds, because the mesh and vents on any charging case and its earbuds collect dust and earwax over time, and a soft brush plus sponge is the right tool for that job without scratching anything. The pen tip handles the stubborn bits around the speaker grilles. It's a small thing, but it's the detail that makes this package feel more thought-through than a plain skin.
RLSOCO Case: Who It's For
The RLSOCO Case is a different animal entirely: a hard storage case made from high-density EVA and polyester fiber with a soft velvet lining, sized at roughly 4.13 x 3.15 x 2.17 inches. It's custom-cut for the JBL Endurance Peak 3 true wireless earbuds, which are an IP68 dust- and water-proof active model — so the case is aimed at people who take their earbuds to the gym, on runs, or on trips and want them protected when they're not in use.
The interior layout is the real selling point. The top cover has a mesh pocket for cables and small accessories, and the bottom section stores the earbuds, so the charging case and its cable don't tangle together. There's also a tongue strap inside that lifts the earbuds up so you're not digging around with your fingers. The velvet lining means the charging case isn't rattling against bare plastic, and the shell is described as a solid shield against bumps, shocks and crushes, with water and dust resistance on top.
RLSOCO also points to the materials: the fabric, lining and EVA compartments are certified to RoHS and SGS standards, and the brand says it uses a thicker grade of EVA so the case doesn't deform easily. It carries a two-year warranty. A metal hook lets you clip it to a backpack, and the compact footprint fits a pocket, backpack or handbag — though realistically this is a bag-and-locker case rather than a pocket case.
Who should buy it: JBL Endurance Peak 3 owners who want one organized, hard-shell place for their earbuds, charging case and cable. Who should skip it: anyone with a different earbud model — the fit is customized for the JBL Endurance Peak 3, and neither the earbuds nor accessories are included. If you want a decorative skin for a charging case you already carry loose, this is overkill.
• Best for AirPods 4 owners → XMBYGY Pen Case. It's molded for the AirPods 4 (2024) charging case specifically.
• Best for JBL Endurance Peak 3 owners → RLSOCO Case. Custom-cut for that model and its accessories.
• Best for charging case organization → RLSOCO Case. Mesh pocket up top, earbuds below, tongue strap to lift them out.
• Best for style and color variety → XMBYGY Pen Case. Three cartoon silicone skins in the box.
• Best for hard-shell travel protection → RLSOCO Case. High-density EVA and polyester with a velvet lining against bumps and crushes.
• Best for keeping earbuds clean → XMBYGY Pen Case. The included cleaning pen covers dust and stubborn grime.
• Best for clipping to a bag → Either. XMBYGY includes a carabiner; RLSOCO uses a metal hook.
• Best for gifting → XMBYGY Pen Case. The cartoon skins and three-pack format suit a gift for a teen or friend.
If I had to pick one, I'd buy the RLSOCO Case — but only because of who it's for. If you own JBL Endurance Peak 3 earbuds, the organized interior, hard shell and two-year warranty make it the more useful purchase, since it solves a real problem: keeping your charging case, earbuds and cable from becoming a mess in your bag. If you own AirPods 4, the XMBYGY Pen Case is the smarter buy instead — three skins, a cleaning pen and a carabiner cover the everyday stuff that actually matters for a charging case you carry around. Match the case to your earbuds and you'll be happy either way. And do check the current price on Amazon before deciding, since that's the one thing that can tip the scale.
how to charge earbuds case
You charge an earbuds charging case by connecting it to a power source with its charging cable — typically USB-C or Lightning depending on the model — and letting the case's internal battery fill up. The RLSOCO Case has a mesh pocket specifically for storing that cable so it's always with your earbuds. The XMBYGY Pen Case is a silicone cover for the AirPods 4 charging case, so it stays on while you charge; you just plug in as usual.
how to charge case without earbuds
You can charge a charging case without the earbuds inside — the case holds its own battery and doesn't need the earbuds present to accept a charge. Both cases here are covers or storage shells, not chargers themselves, so the process is unchanged: plug the charging case in and let it fill. Just make sure the charging port isn't blocked by the cover.
how to charge jlab earbuds case
JBL earbuds charging cases charge the same way as any other: connect the case to a USB power source with its cable and let it fill. The RLSOCO Case is made for the JBL Endurance Peak 3, and its mesh pocket is designed to hold cables and small accessories so your charging setup stays together. Remove the earbuds from the case before charging if you want the fastest, cleanest top-up.
how to charge apple earbuds case
AirPods charging cases charge by cable, and AirPods 4 with a wireless charging case can also sit on a compatible wireless pad. The XMBYGY Pen Case is a soft silicone cover for the AirPods 4 charging case, so it's thin enough to leave on during charging, though you may prefer to slide it off if you use a wireless pad. Either way, no special steps — plug in or drop it on the pad and let it charge.
As an Amazon Associate I earn from qualifying purchases.
We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon and affiliated sites.
When you buy through links on this page, we may earn a commission from qualifying purchases at no extra cost to you.
Amazon and the Amazon logo are trademarks of Amazon or its affiliates. This site is an independent third-party review and is not affiliated with, endorsed by, or sponsored by Amazon or the product brands mentioned.
See also: HomeSpot KR10C vs Asobilor USB-C Audio Cable, 1Mii RCA vs ZUMUSEN Sleep Headphones Mask: Bluetooth Stereo, Jesebang Earbuds vs Monster Clarity 101Plus, Picun F8 vs TOZO HT3