{"product_id":"retevis-rt21-rt21v-replacement-battery-1100mah-li-ion-5-pack","title":"Retevis RT21 RT21V Replacement Battery 1100mAh Li-ion (5 Pack)","description":"\u003cp\u003eIn this review the Retevis RT21 RT21V replacement battery pack is examined for users who rely on two-way radios for extended shifts and frequent outings. The bottom line: this five-pack of 1100mAh Li-ion batteries is best for teams and individuals who need dependable spare cells to keep RT21 or RT21V radios running without interruption. It stands out as a practical backup solution that extends operating time and reduces downtime, making it a sensible choice for security, events, and outdoor work where continuous radio use matters.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRechargeable replacement battery:\u003c\/strong\u003e Provides a direct substitute for original cells so radios can be returned to service quickly without reprogramming or adapters.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1100mAh Li-ion capacity:\u003c\/strong\u003e Offers higher capacity than many single-use options, delivering longer run times between charges for typical radio use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e3.7V nominal voltage:\u003c\/strong\u003e Matches the radios requirements to ensure safe, compatible power delivery during operations.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLightweight and portable:\u003c\/strong\u003e At about 68g per battery, the pack is easy to carry as spares for long shifts or for packing into a kit for events and outdoor activities.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDesigned for specific models:\u003c\/strong\u003e Customized to fit only Retevis RT21 and RT21V two-way radios, which avoids loose connections and fit issues.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMultiple spare batteries:\u003c\/strong\u003e The five-pack format keeps several radios active simultaneously or supplies backups for teams working across shifts.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThe Retevis replacement pack suits security teams, event staff, paintball and outdoor groups, and businesses like restaurants or hotels that use RT21\/RT21V radios and need reliable spare power. It is particularly useful where continuous communication is critical and quick battery swaps reduce operational interruptions.\u003c\/p\u003e\n\u003cp\u003eThose who should look elsewhere include buyers who need universal battery solutions for many radio models or users who require batteries with substantially longer runtimes than 1100mAh can offer for extremely high-duty-cycle use. Also, it is not intended for radios other than the RT21\/RT21V family.\u003c\/p\u003e\n\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eOffers reliable replacement power to keep RT21\/RT21V radios running during long events or shifts.\u003c\/li\u003e\n\u003cli\u003eFive batteries in a pack reduce the need to recharge during multi-person operations and serve as practical spares.\u003c\/li\u003e\n\u003cli\u003eLightweight 68g units are easy to carry and swap in the field without adding significant bulk.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCapacity is 1100mAh, which is solid but not ultra-high; very heavy radio users may need extra spares or frequent recharging.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eBattery type\u003c\/td\u003e\n\u003ctd\u003eLi-ion\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage\u003c\/td\u003e\n\u003ctd\u003e3.7V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCapacity\u003c\/td\u003e\n\u003ctd\u003e1100mAh\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eQuantity\u003c\/td\u003e\n\u003ctd\u003e5 pack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight (each)\u003c\/td\u003e\n\u003ctd\u003eAbout 68g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible models\u003c\/td\u003e\n\u003ctd\u003eRetevis RT21, RT21V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe five-pack of Retevis RT21 RT21V 1100mAh batteries is a practical, cost-effective way to keep a fleet of RT21 radios active through long shifts and events. It is good value for teams that need simple, reliable spares tailored to these models, offering straightforward compatibility and easy portability for security, hospitality, and outdoor use.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eAre these batteries compatible with other radio models?\u003c\/strong\u003e\u003cbr\u003eThey are designed specifically for Retevis RT21 and RT21V radios and fit those models; they are not guaranteed to fit or be safe with other radios.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow long do the batteries typically last on a charge?\u003c\/strong\u003e\u003cbr\u003eWith 1100mAh capacity, expect several hours of active use depending on transmit duty cycle; the pack is intended to provide 3-4 hours of charging use scenarios and extended runtime when used as spares.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs a special charger required?\u003c\/strong\u003e\u003cbr\u003eNo special charger is required beyond the charger compatible with RT21\/RT21V batteries and radio charging accessories; these are standard Li-ion replacement cells matched to the radio charging design.\u003c\/p\u003e","brand":"Retevis","offers":[{"title":"Default Title","offer_id":48249611583707,"sku":"B078X8CGD4","price":38.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/61YbP3Wda8L._AC_SL1500.jpg?v=1770965554","url":"https:\/\/gearmusthave.com\/products\/retevis-rt21-rt21v-replacement-battery-1100mah-li-ion-5-pack","provider":"GearMustHave","version":"1.0","type":"link"}